Chapter Summaries

Key plot points and events

• While analyzing the Great Holy Grail, Xiu Er considers Number One’s proposal to hold another Holy Grail War so the group can study more Servants. Number Two supports the idea, arguing that a single battle offers too few useful Noble Phantasms to analyze.
• Xiu Er completes his analysis and synchronizes the newly discovered information with all his Doppelgangers. They learn that the Grail connects to the Throne of Heroes, a repository of Heroic Spirit data beyond the flow of time.
• The discovery seems to undermine Number Two’s argument: perhaps the group can access Servant data directly through the Grail. But Xiu Er explains that the link does not allow them to download that data, so he approves Number One’s proposal after all.
• Xiu Er tries to reproduce the Great Holy Grail using the Codex of the Whispers. The result is only a mass of high-energy matter, not a functioning Grail; he lacks the Third Magic, Materialization of the Soul, needed to recreate its essential functions.
• Instead, Xiu Er begins uploading his own data to the Throne of Heroes. His plan is for a version of himself to be summoned as a Servant, encounter other Servants, and send information back to him across worlds. A golden gate opens amid flames as an armored figure emerges, hooded in black.

Character developments and interactions

• Number One’s childhood perspective makes him the group’s “idea man.” Frustrated that Xiu Er usually rejects his proposals, he has Number Two present this one instead.
• Number Two carefully argues in favor of the plan, monitoring Xiu Er’s reaction. After the Grail’s capabilities are revealed, he assumes his case has failed—but Xiu Er’s approval surprises him.
• Xiu Er remains analytical and emotionally restrained, but his failed attempt to replicate the Grail leaves him mildly displeased. He quickly turns to a practical workaround.

Significant themes

• Knowledge and its limits: Xiu Er can analyze and copy much of the Grail’s structure, yet a missing magical principle prevents a true replication.
• Adaptation and ingenuity: When direct access to Servant records proves impossible, Xiu Er devises an indirect way to gather information.
• Identity across time and worlds: A summoned Doppelganger can act independently while remaining connected to Xiu Er and his expanding database.
• Collective yet individual thought: The Doppelgangers share memories and a machine-like way of communicating, but their different points of origin produce distinct perspectives.

Key plot points

• Xiu Er, appearing openly as a blue-violet mechanical humanoid, confronts Karna, whom she identifies as Ruler, Amakusa Shirou Tokisada—though the white-haired opponent is later named Karna.
• Karna attacks with overwhelming fire and a blazing spear, but Xiu Er’s shield and evasive movement protect her. As the fight continues, she rapidly improves her weapon technique, turning their close combat increasingly against him.
• Xiu Er traps Karna’s spear by dropping her shield, then drives her greatsword into his chest. Karna catches the blade with his ring-shaped shoulder armor, but Xiu Er unleashes a powerful energy blast that overwhelms him and cracks the armor.
• With his magical energy nearly exhausted, Karna can no longer sustain his defenses or heal. Xiu Er approaches but delays finishing the fight, monitoring her data-collection progress.
• She concludes that Karna needs magical energy, then strikes his chest with a golden object that transfers energy into him. Karna is stunned by the unexpected replenishment as Xiu Er’s experiment continues.

Character developments

• Xiu Er shifts from relying on speed and defenses to adapting her combat technique in real time. Her calm, analytical approach reveals that the duel is also a data-gathering experiment.
• Karna begins composed and confident, but becomes exhausted and vulnerable as his energy and armor fail. His surprise at Xiu Er’s energy transfer exposes how completely she has defied his expectations.

Significant themes

• Adaptation and asymmetry: Xiu Er learns during combat, while Karna’s conventional strength and skill cannot keep pace with her technological abilities.
• Battle as experimentation: Xiu Er treats the duel as a mission, tracking data and testing energy conversion rather than simply seeking victory.
• Power and dependence: Even a mighty warrior is vulnerable when his energy supply runs out—and can become dependent on an opponent to restore it.

Character interactions

• Karna attacks Xiu Er relentlessly, while she counters with shields, increasingly refined weapon work, and a decisive energy blast.
• After defeating him physically, Xiu Er chooses to restore his energy rather than finish him, leaving Karna confused and wary about her motives.

Key plot points and events

• Four completes a modification to Karna’s Command Spells during their fight, then blasts him with a powerful golden attack. Karna is hurled away, while three crimson marks remain on Four’s hand.
• In the Boundary, Number One removes the Command Spells from an unconscious Red Master. She confirms the Master is unharmed, but Joan recognizes that the person is no longer a Master.
• Number One silences Joan with a sound-suppressing barrier and tries to view Four’s fight. Four refuses to share her feed, so Number One connects to Number Seven’s instead.
• The shared feed shows Xiu Er fighting Vlad III in a storm filled with blood-red bats and weapons formed from blood. Xiu Er’s Golden Shield withstands the attacks, and she tracks Vlad through the visual chaos.
• Vlad transforms into a monstrous, bloodthirsty form and attacks Xiu Er directly. The chapter ends as they face off.

Character developments

• Four demonstrates that her Command Spell modification works, though the chapter does not explain its full effect.
• Number One is methodical and curious, but impatient with Joan’s questions. Her detached manner contrasts with her eagerness to watch the battles.
• Joan remains protective of the unconscious Masters and alarmed by Number One’s actions, though she relaxes briefly when assured the Master is safe.
• Xiu Er remains composed under sustained attack, relying on her shield and senses rather than being disoriented by the swarm.
• Vlad III appears to have abandoned his former elegance and become a savage, blood-driven combatant.

Significant themes

• Control and identity: Removing Command Spells strips a Master of their status and raises questions about the consequences of altering magical bonds.
• Observation and distance: Number One watches others’ struggles through shared feeds, treating battle as both spectacle and experiment.
• Transformation: Four’s modifications and Vlad’s monstrous change show how bodies and identities can be altered.
• Composure amid chaos: Xiu Er’s calm contrasts with the storm, the sensory assault, and Vlad’s rage.

Character interactions

• Four confronts Karna and demonstrates her newly completed modification.
• Joan challenges Number One over the Masters’ safety, but Number One ignores her, then suppresses her voice.
• Number One seeks a view of Four’s fight, is refused, and turns to Number Seven’s feed instead.
• Xiu Er and Vlad exchange attacks: her shield defeats his blood-based assaults, until he appears at close range to strike directly.

Key events

• Count Dracula’s Bewitching Demon Eye catches Xiu Er off guard, allowing him to overwhelm her with a relentless aerial assault. He uses blood spears, explosive fragments, and a giant-wolf transformation, but her armor and thrusters let her survive and counterattack.
• Xiu Er’s Doppelganger, Number Seven, has deliberately been collecting combat data. Once the data is complete, she announces the mission’s end and begins “cleanup operations.”
• Xiu Er secretly freezes the ground and the blood spears pinning her. She breaks free, catches Dracula’s attacking hand, and reveals Michael, a key-like weapon that seals his abilities.
• She punches him into a black-and-gold teleportation vortex, which drops him from high above. Xiu Er forms a massive bow, Pseudo-Codex: El Kanaph, and fires a black lance at the falling Count. The chapter ends as the arrow surges upward through the storm.

Character developments

• Xiu Er remains composed under extreme pressure, using the fight to gather information rather than immediately relying on her strongest defenses. Once her mission is complete, she shifts decisively from defense to a carefully staged finishing attack.
• Count Dracula / Black Lancer is consumed by Mad Enhancement. His tactics are powerful and adaptable, but his rage and confidence leave him unaware of Xiu Er’s hidden preparations.
• Number Seven is revealed as the Doppelganger responsible for the encounter and data collection, framing the apparent struggle as part of a planned operation.

Significant themes

• Preparation versus brute force: Dracula’s escalating attacks are met by Xiu Er’s patience, analysis, and planned countermeasures.
• Deception and concealed power: Xiu Er appears trapped while secretly freezing her surroundings, then reveals abilities and weapons Dracula did not anticipate.
• Control and escalation: The fight moves from survival to a decisive attempt to disable and finish the opponent.

Character interactions

• Dracula relentlessly hunts Xiu Er, using transformations and blood-based attacks to exploit openings.
• Xiu Er answers with mechanical strength and precision, then physically restrains Dracula long enough to seal his powers with Michael.
• Number Seven’s mission updates reveal that Xiu Er’s apparent predicament was part of a larger plan, culminating in her launching the final attack.

Key plot points and events

• Number Seven completes her mission, killing Black Lancer with a transformed spear-arrow that pierces both him and the storm clouds overhead. His body dissolves into golden light, and she returns to the Boundary.
• Back at the Boundary, Number Seven finds Number Two using a powerful, custom-built computer to research the world and analyze the Codex of the Whispers. Its analysis is only 50.3% complete, though the group has been in this world for just one day.
• Number Two reveals that the original Xiu Er has gone to deal with Shiro Amakusa, Red Assassin’s Master and a survivor of the previous Holy Grail War.
• Number Seven questions Number Two’s increasingly casual manner of speaking, suspecting Number One has influenced him. Number Two explains that he comes from a point in Xiu Er’s past before she acquired the system, so his speech resembles her earlier habits.
• Number Seven reports that Black Lancer’s Dracula transformation gave him powerful regeneration and endurance, but ultimately only made the fight more useful for gathering data.
• Number Five returns through a golden gate, accompanied by an unconscious pink-haired girl; his arrival is left unexplained as the chapter ends.

Character developments and interactions

• Number Seven remains highly literal, practical, and emotionally restrained. She completes her assignment efficiently and gives a concise, objective account of the battle, though Number Two presses her for her personal impressions.
• Number Two is an intelligence specialist who supports the Codex’s analysis and gathers information online. He is more conversational and informal than Number Seven expects, and explains that this reflects the version of Xiu Er from whom he originated. He jokes about being “clerical staff,” despite retaining substantial combat capability.
• Their interaction is marked by pauses, direct questions, and dry humor. Number Seven’s suspicion that Number One has affected Number Two is corrected, while Number Two’s teasing fails to draw much reaction from her.
• Number Five appears at the end with an unconscious companion, setting up a new development.

Significant themes

• Identity and versions of the self: The Doppelgangers recognize one another as distinct stages or aspects of Xiu Er, with personalities shaped by when they originated.
• Duty and efficiency: Number Seven treats combat and reporting as tasks, while Number Two focuses on analysis and intelligence gathering.
• The contrast between detachment and human habits: The Doppelgangers’ mechanical precision coexists with traces of Xiu Er’s earlier speech patterns, humor, and curiosity.

Key events

• Number Five arrives carrying an unconscious, badly injured Astolfo, identified as Black Rider. He says he detained him because Rider’s condition had interrupted the information-gathering task.
• Number Five has also “resolved” Black Berserker, though he has not yet submitted the report. He plans to complete Rider’s data collection first.
• The Numbers briefly trade dry, robotic remarks about one another’s behavior. Number Two calls Numbers Five and Seven “bots”; they counter that Number Two and Number One are too lax. Their mock dispute ends with Number Two returning to his work.
• Number Five leaves to treat Astolfo elsewhere, since Xiu Er’s main body is absent and he cannot use Zafkiel to restore him.
• At 3:01 a.m., Number Three returns from a mission carrying a battle axe. He and Number Seven silently communicate, then join Number Two at the computer. Number Two confirms he has already read Number Three’s uploaded battle report.
• By 5:04 a.m., Avicebron has completed the final stage of the Furnace Core. Returning from his workshop, he finds several identical “dolls” gathered together and is puzzled.

Character developments and interactions

• The Numbers’ identical selves display distinct habits: Number Five and Number Seven are formal and task-focused, while Number Two is more openly conversational and wry. Their banter suggests they are comfortable enough with themselves to tease one another.
• Number Five shows some restraint in fighting Astolfo, according to Number Two, and intends to keep him alive for further work.
• Number Three is curious about the others’ exchange but has little to ask, since he has already read the mission report.
• Avicebron remains wholly absorbed in his Noble Phantasm project after receiving the ideal Furnace Core material from Xiu Er, staying apart from events until his work is done.

Significant themes

• Identity and selfhood: The Numbers’ conversation plays on what it means to argue with oneself, while their different temperaments distinguish otherwise identical copies.
• Duty versus personality: Their stiff, machine-like language is partly camouflage, but each retains individual quirks and humor.
• Information and efficiency: Reports, data collection, and mission updates structure the Numbers’ work, even as their casual exchanges interrupt it.
• Isolation and focus: Avicebron’s single-minded concentration contrasts with the Numbers’ group interactions.

Key plot points and events

• Several Xiu Er “Doppelgangers” are fighting Servants while the main body is elsewhere. Avicebron approaches the group and watches a projected scene of one such battle.
• In a flashback, Xiu Er fights Achilles in a forest. Their speed and strength are closely matched: Achilles relies on refined spear technique, while Xiu Er compensates with sharp judgment, improvisation, and El Re’em’s unusual size.
• Achilles’s near-invulnerability prevents Xiu Er’s powerful thrust from penetrating his armor. He remains delighted by the contest and eager for a worthy fight.
• Achilles notices that Xiu Er’s attacks are lethal but seem to lack fighting spirit—or even humanity. Xiu Er, meanwhile, is privately pleased that his battle-focused personality makes him easier to handle while her data-collection progress rises.
• Xiu Er surprises Achilles with an acrobatic kick using her leg armor. The impact launches him through the forest, toppling trees and clearing a long path.
• Xiu Er checks his condition with a drone. He appears to have no abnormal status, despite being thrown roughly 2.4 kilometers.

Character developments

• Xiu Er shows that her apparent calm conceals a practical, analytical mindset: she treats the fight partly as an opportunity to gather data. Her nonhuman nature is emphasized by her unnatural movements and emotional stillness.
• Achilles is portrayed as an exuberant warrior who values skillful combat above all else. Rather than resent Xiu Er’s unusual tactics, he admires them and relishes the challenge.

Significant themes

• Appearance versus capability: Xiu Er’s small stature contrasts with her strength and mastery of an oversized weapon.
• Humanity and emotion: Achilles senses that Xiu Er’s techniques are deadly but lack the human passion he expects from a fighter.
• Adaptation and unconventional skill: Xiu Er’s improvisation and mechanical abilities allow her to match Achilles’s superior traditional technique.
• Combat as joy and data: Achilles fights for the thrill of battle, while Xiu Er also treats the encounter as a source of information.

Character interactions

• Achilles and Xiu Er exchange attacks and praise through their actions: he openly admires her tactics, while she stays outwardly impassive and uses his aggression to her advantage.
• Avicebron observes the battle through the Doppelgangers’ projection, linking the forest confrontation to the wider group of Xiu Ers.

Plot points and events

• Xiu Er’s drones track Achilles after she kicks him more than two kilometers through the forest. Despite the impact, he is unharmed.
• Achilles attacks with his Meteor Spear, combining a throw, a high-speed kick, and rapid movements through the woods. Xiu Er anticipates his attacks and blocks or dodges them.
• Achilles changes tactics mid-strike, redirecting his spear toward Xiu Er’s heart. She drops her own weapon, slips aside, traps his spear beneath her arm, and draws him close.
• Achilles releases his weapon to avoid her elbow, but Xiu Er uses a burst of golden speed to strike his chin and launch him into the air.
• Before she can follow up, Atalanta intervenes with arrows, protecting Achilles and forcing Xiu Er to abandon the pursuit. Achilles lands unharmed, though he feels the blow.
• Atalanta urges Achilles to finish the fight quickly. He retrieves his spear, and the two prepare to attack together. Xiu Er calmly waits, then summons the fallen El Re’em back to her hand.

Character developments

• Xiu Er demonstrates tactical adaptability, precise timing, and formidable strength. She remains composed throughout, using observation and unconventional movement to counter Achilles’s speed and feints.
• Achilles is resilient and inventive, adjusting his tactics when brute force fails. He also shows a playful, competitive streak, but accepts Atalanta’s intervention and agrees to end the fight quickly.
• Atalanta emerges as a cautious, practical ally. She acts decisively to protect Achilles, reprimands him for prolonging the fight, and insists they focus on their urgent objective.

Significant themes

• Strategy versus speed and strength: Achilles’s rapid attacks test Xiu Er, but her prediction and improvisation repeatedly overcome his physical advantages.
• Teamwork and interference: Atalanta’s intervention changes the duel’s outcome, showing that individual skill is affected by allies and battlefield circumstances.
• Composure under pressure: Xiu Er’s calm contrasts with the urgency and intensity of the fight.
• The difference between damage and sensation: Achilles remains physically unharmed, yet Xiu Er’s elbow still causes real pain, underscoring that invulnerability does not erase the experience of being struck.

Character interactions

• Xiu Er and Achilles engage in a tense, increasingly tactical duel, with each adapting to the other’s moves.
• Atalanta protects Achilles from Xiu Er’s follow-up and scolds him for treating the fight as an enjoyable challenge.
• Achilles calls Atalanta “sis,” prompting her to tell him not to; despite their teasing familiarity, they coordinate against Xiu Er.
• The chapter ends with the three facing a renewed confrontation, as Xiu Er retrieves her weapon and Achilles and Atalanta prepare to attack together.

Key plot points and events

• Atalanta prevents Xiu Er from recovering his weapon by shooting it out of reach, while Achilles charges in with a powerful spear thrust.
• Xiu Er reveals a hidden weapon: golden energy restrains Achilles, followed by a black Chain that binds him. Atalanta answers with a magical arrow barrage, forcing Xiu Er to use Achilles as a shield.
• Xiu Er then attacks Atalanta through the forest itself, shaping earth into spikes and a giant hand and turning branches into tentacles. Atalanta dodges and fights back, but is eventually flung into the air.
• Xiu Er hurls the still-bound Achilles toward her. Atalanta uses Achilles as a springboard to evade Xiu Er, then fires arrows that disrupt the Chain and give Achilles a chance to escape.
• The battle swings back and forth, with neither side gaining a lasting advantage. By 3:23 a.m., Atalanta recognizes that Xiu Er is far more dangerous than she first judged.

Character developments

• Xiu Er demonstrates considerable strength, tactical flexibility, and control over his surroundings. He adapts quickly, using restraints, terrain, and even Achilles as tools.
• Atalanta shifts from observing the fight to actively supporting Achilles. Though shaken by Xiu Er’s power, she remains determined not to abandon her partner and relies on speed, precision, and quick improvisation.
• Achilles fights fearlessly and endures attacks thanks to his exceptional durability, but being used as a shield humiliates him. Atalanta’s accurate arrows help him escape Xiu Er’s restraints.

Significant themes

• Adaptation and tactical ingenuity: The fighters repeatedly counter one another, turning weapons, terrain, and circumstances to their advantage.
• Partnership and loyalty: Atalanta’s support is essential to Achilles, and she chooses to stay rather than leave him to face Xiu Er alone.
• Strength versus perception: Atalanta’s initial assessment proves inadequate; experiencing Xiu Er’s attacks firsthand reveals how formidable he is.
• The cost of resilience: Achilles can withstand pain, but his durability does not prevent humiliation or tactical disadvantage.

Character interactions

• Xiu Er and Achilles engage in direct combat, with Xiu Er binding, redirecting, and weaponizing Achilles against Atalanta.
• Atalanta repeatedly supports Achilles with well-timed arrows, first targeting Xiu Er’s weapon and later weakening the Chain.
• Atalanta and Xiu Er engage in a tense pursuit through the forest, as Xiu Er tracks her while she evades attacks from the environment he controls.

Chapter summary

Key plot points

• Atalanta continues supporting Achilles from the forest, since her attacks cannot penetrate Xiu Er’s seemingly inexhaustible defensive magecraft. She uses arrows to clear obstacles and create openings.
• Achilles and Atalanta coordinate a successful maneuver: Achilles disrupts Xiu Er’s balance while Atalanta strikes from the opposite side, allowing Achilles to knock Xiu Er down and pin her to the ground.
• Xiu Er escapes by grabbing Achilles’s spear and using his pull to launch herself into the air. She then unleashes a wide-area attack, sending earthen spikes bursting from the ground and forcing Achilles to leap clear.
• Xiu Er reveals her appearance, discarding her cloak to show a petite, girl-like figure with blue-violet hair, glowing golden eyes, and unusual mechanical armor and devices.
• Her sudden aura makes clear that she has not yet fought seriously. Achilles, offended but eager, answers by abandoning restraint and challenging her to fight with everything they have.
• At 3:30 AM, Achilles charges at full speed with a much sharper, more powerful spear attack. Xiu Er begins calculating its force but realizes she lacks data for Achilles fighting at full strength.

Character developments

• Atalanta accepts that direct attacks are useless and focuses on tactical support. She and Achilles demonstrate increasingly effective teamwork, though she still hesitates over a possible decisive option.
• Achilles shifts from a fast, forceful assault to a battle of endurance, then returns to an all-out offensive after Xiu Er reveals her true power. His competitive pride and love of combat drive him.
• Xiu Er remains composed and difficult to harm, but her escape and ground attack show that her defenses are only part of her capabilities. By dropping her disguise and increasing her pressure, she signals a new, more serious phase of the fight.

Themes and interactions

• Coordination versus overwhelming strength: Atalanta’s precise support lets Achilles briefly overcome Xiu Er’s defenses, but Xiu Er adapts and escapes.
• Uncertainty and escalation: Both sides adjust as the fight reveals new abilities; Xiu Er’s unknown appearance and Achilles’s previously hidden strength change the stakes.
• Combat as mutual challenge: Achilles welcomes the danger and seeks a decisive, unrestricted clash, while Xiu Er approaches the battle with cold calculation.
• Teamwork: Achilles creates openings through close combat, and Atalanta exploits them with perfectly timed arrows; each protects the other from counterattacks.

Plot points and events

• As Achilles launches a full-force attack, Xiu Er blocks it with a golden barrier that absorbs the impact. The encounter lets Xiu Er update his combat data on Achilles, though his Noble Phantasm remains unrecorded.
• Xiu Er springs a trap: black chains erupt from beneath the ground. He pins Achilles with El Re’em and drives him across the forest at extreme speed, carving a long trench.
• When Achilles begins to break free, Xiu Er stomps on his arm and fires an all-directional close-range blast. The explosion devastates the surrounding area, but Achilles emerges unharmed, though battered and overheated.
• Xiu Er follows up with a coordinated attack, knocking aside Achilles’s spear, binding his ankle with the chains, and towing him high into the sky. Atalanta arrives too late to intervene and sees Achilles being dragged upward.
• Achilles whistles for his Noble Phantasm, the chariot Troias Tragoidia. It charges into Xiu Er, breaking the chains’ hold. Achilles boards the chariot and prepares to counterattack.

Character developments

• Xiu Er reveals a highly tactical approach: he uses defense to gather data, combines speed and weaponry to control the fight, and deliberately draws out Achilles’s trump card. His rare smile signals that this was part of his plan.
• Achilles is initially shocked by Xiu Er’s barrier and repeatedly forced onto the defensive, but remains composed and resilient. He adapts, waits for an opening, and summons his chariot to regain control.
• Atalanta recognizes that Achilles may lose if isolated and decides they must fight together. Her urgency highlights her strategic judgment and concern for their survival.

Significant themes

• Preparation versus raw power: Xiu Er’s calculations, traps, and layered attacks let him control a formidable opponent.
• Adaptation through combat: His codex data is only provisional until tested in battle.
• Escalation and hidden capabilities: Each fighter reveals more of their strength, building toward Achilles’s Noble Phantasm.
• Partnership and vulnerability: Atalanta sees that either warrior could be overwhelmed alone, making cooperation essential.

Character interactions

• Xiu Er and Achilles engage in a fast-moving contest of tactics and strength: Xiu Er repeatedly restrains and redirects Achilles, while Achilles searches for a chance to counter.
• Atalanta watches their initial clash, concludes Achilles needs support, and races to join him—but arrives just as Xiu Er carries him skyward.
• Achilles’s chariot interrupts Xiu Er’s control of the fight, setting up the next exchange.

Key plot points and events

• Achilles uses his chariot’s speed to drive Xiu Er toward the ground from high altitude, seemingly trapping her behind its golden barrier.
• Rather than dodge, Xiu Er studies the chariot and secretly sends nearly invisible Chains through the barrier, wrapping them around the horses, reins, and vehicle.
• Achilles realizes Xiu Er has deliberately avoided his heel—the one weakness that can undo his invulnerability—and suspects she has been steering the fight toward this moment.
• Near the ground, Xiu Er drops the barrier, grabs the lead horse, and tightens the Chains, tangling the three horses and binding them, the chariot, and Achilles into a single mass.
• Xiu Er escapes with a burst from her waist thrusters. Achilles dismisses his chariot and horses to avoid their being badly injured, but falls the remaining distance and crashes into the earth.
• Achilles climbs out of the crater. Atalanta, watching nearby, sees Xiu Er’s golden streak escape but cannot tell where she has gone.

Character developments

• Xiu Er demonstrates patience and tactical precision: she forgoes an immediate attack on Achilles’s heel to gather information and manipulate him into committing his Noble Phantasm.
• Achilles shifts from enjoying a formidable opponent to recognizing the danger of Xiu Er’s deliberate restraint. His concern for his divine horses influences his decision to dismiss the chariot rather than let them be injured.
• Atalanta remains an observer, but her attention turns to locating Xiu Er after the crash.

Significant themes

• Strategy over force: Xiu Er wins the exchange through observation, preparation, and timing rather than matching Achilles’s strength directly.
• The cost of invulnerability: Achilles’s protection depends on magical energy and has a known weakness, while his powerful chariot creates additional vulnerabilities.
• Restraint as a tactic: Xiu Er’s choice not to exploit Achilles’s heel initially becomes part of a larger plan.

Character interactions

• Xiu Er and Achilles engage in a contest of perception as much as combat: she conceals her setup, while he gradually detects that her attacks and movements are purposeful.
• Xiu Er turns Achilles’s bond with his divine horses against the situation, forcing him to choose between preserving them and maintaining his Noble Phantasm.
• Atalanta watches the battle from a distance and tries to track Xiu Er after her escape.

Key plot points and events

• Achilles’s Chains arrive, but their unknown master remains concealed. A sudden storm then erupts, limiting Achilles’s vision and throwing him off guard.
• Xiu Er attacks from within the storm and drives Achilles out of it with a heavy blow. When Achilles counters with his spear, she produces a near-identical copy of his Meteor Spear.
• Xiu Er uses the surprise to disarm and pin Achilles, then stomps him into a massive crater. She targets his heel—the weakness that can break his Invincible Golden Body—while continuing to gather combat data.
• Having nearly completed her analysis of Achilles’s Noble Phantasms, Xiu Er unleashes a golden energy blast from her copied spear. The attack devastates Achilles’s armor and injures him, overcoming his invulnerability.
• Achilles responds by summoning his defensive Noble Phantasm, Achilles Cosmos, a giant silver shield. It blocks the blast, while Xiu Er escapes its force and lands in the golden slurry filling the crater.
• Achilles emerges battered, discards his ruined armor, and asks whether this is Xiu Er’s full-power form.

Character developments

• Xiu Er demonstrates that she can analyze and reproduce an opponent’s Noble Phantasm, though her copy differs somewhat in appearance and power. Her objective is not simply to defeat Achilles: she is deliberately collecting data and trying to draw out his remaining Noble Phantasm.
• Achilles shifts from confident combatant to startled, seriously threatened opponent. The copied spear unsettles him, and Xiu Er’s assault forces him to reveal his powerful defensive shield. He remains resourceful, protecting himself despite severe pain and injury.

Significant themes

• Knowledge as a weapon: Xiu Er turns observation and analysis into increasingly effective attacks.
• Adaptation and imitation: Her ability to reproduce Achilles’s weapon destabilizes his sense of advantage.
• Invulnerability and vulnerability: Achilles’s protection is formidable but conditional; Xiu Er’s precise attack on his heel exposes its limits.
• Escalation and survival: Each fighter responds to the other’s power with a stronger tactic, transforming the battlefield into a crater while keeping the duel unresolved.

Character interactions

• Xiu Er exploits Achilles’s confusion over the copied spear rather than explaining how it works.
• Achilles tries to counterattack but loses control of his weapon and is pinned beneath Xiu Er.
• Xiu Er focuses on Achilles’s heel to breach his defenses, prompting him to summon Achilles Cosmos.
• Their exchange ends with Achilles still alive and shielded, questioning Xiu Er’s strength as the confrontation continues.

Plot points and events

• Xiu Er finishes collecting combat data on Achilles, causing the mission to shift its target to Atalanta. She asks for assistance, and another Xiu Er arranges support.
• Achilles is badly injured and trapped in the crater, unable to escape the molten pool. A blazing fireball crashes into the crater, vaporizing the pool and turning the ground to lava.
• Karna emerges from the explosion and announces that he has come to help on the orders of his new Master. Rather than rescue Achilles, he points his spear at him.
• Xiu Er orders Karna to deal with Achilles, then leaves to pursue another target. Achilles realizes Karna has defected to the unknown faction and attacks him with his shield despite his injuries.
• Xiu Er reads the report explaining Karna’s defection: when one of the Xiu Ers took the place of his Master, Karna accepted the change and switched sides immediately.

Character developments and interactions

• Achilles moves from cautious hope at Karna’s arrival to anger and disbelief when he realizes his former ally is now his enemy. Though badly wounded, he fights rather than accept the humiliation of betrayal.
• Karna is revealed to be unusually willing to serve whoever holds the status of his Master. He joins the Xiu Ers’ faction, apparently prioritizing that role over his former allegiance or his Master’s captivity.
• Xiu Er remains composed and mission-focused, treating Karna’s unexpected defection as a useful operational development. She trusts the support sent by her counterpart and promptly assigns him a task.
• The Xiu Ers’ coordination is efficient and impersonal: they share data, request assistance, and divide objectives without concern over who receives credit.

Significant themes

• Loyalty and authority: Karna’s switch raises questions about whether allegiance belongs to a person or to the formal role of “Master.”
• War as strategy and data collection: Xiu Er’s fights are designed to gather information and pressure opponents into revealing their Noble Phantasms.
• Betrayal and survival: Achilles experiences Karna’s defection as a personal betrayal, even as the Xiu Ers regard it as a practical change in sides.
• Emotional distance: Xiu Er’s calm, calculating behavior contrasts with Achilles’ anger and confusion, highlighting the difference between human reactions and the faction’s efficiency-driven mindset.

Plot points and events

• After Karna defects and bonds with Number Four, Xiu Er pursues Atalanta, who has already fled rather than face the odds alone.
• Using her teleportation gates and superior speed, Xiu Er intercepts Atalanta and drags her through the forest, smashing her into trees before hurling her into the ground.
• Atalanta recovers quickly, but realizes escape is no longer possible. She summons and activates her Noble Phantasm, Agrius Metamorphosis, transforming into a monstrous, boar-marked version of herself.
• The transformed Atalanta attacks with rapid magical shots and close-range strikes. Xiu Er blocks and dodges the assault, relying on her shield, armor, sensors, radar, and the Sky Eye’s view. An explosion ignites the forest behind them as the two prepare to continue fighting.

Character developments and interactions

• Xiu Er remains calm and controlled, treating Atalanta’s transformation as something to observe and record. Her confidence reflects her advanced abilities and redundant ways of sensing her surroundings.
• Atalanta shifts from a pragmatic retreat to determined resistance once Xiu Er cuts off her escape. Frustrated and unable to understand her opponent, she uses a costly last resort and gives herself over to rage.
• Their interaction is sharply unequal at first: Xiu Er ambushes and overwhelms Atalanta, then allows her to act. Atalanta responds with a sudden, ferocious counterattack, but Xiu Er appears largely unharmed.

Significant themes

• Survival versus loyalty: Atalanta abandons Achilles when victory seems impossible, choosing retreat over a doomed fight.
• Adaptation and hidden capabilities: Xiu Er’s teleportation and multiple sensory systems make ordinary tactics—including attacking her apparent weak spot—ineffective.
• Power at a cost: Atalanta’s transformation grants her overwhelming fury and destructive force, but its ominous nature suggests a severe personal price.
• Control versus rage: Xiu Er’s detached composure contrasts with Atalanta’s loss of restraint, framing their confrontation as a clash between calculation and unleashed violence.

Key plot points and events

• Atalanta launches a fierce assault on Xiu Er, peppering her with tracking arrows before charging through the battlefield and smashing her into the forest.
• Xiu Er’s armor withstands Atalanta’s attacks. She counters with a cannon blast from her transformed left arm, severely burning Atalanta, then summons two wyverns to seize and tear at her.
• Atalanta fights back despite her injuries, blinding one wyvern with a magical arrow. The other breathes fire at its companion, accidentally freeing Atalanta while cauterizing her wounds.
• Still consumed by rage, Atalanta fires her Noble Phantasm, Bow of the Dark Sky—Tauropolos. Its purple energy spreads across the sky and releases a rain of arrows over the battlefield, threatening both Xiu Er and the distant duel between Achilles and Karna.
• Elsewhere, Semiramis wakes in a vast white, empty space after recalling that a giant, flaming battle axe struck her chest. She finds no wound and realizes she has not died, but cannot explain where she is or how much time has passed.

Character developments and interactions

• Atalanta displays relentless aggression and exceptional resilience, continuing to fight despite devastating injuries. Her fury drives her to unleash a large-scale attack.
• Xiu Er remains controlled and tactical, using her armor, cannon, and summoned wyverns to counter Atalanta’s speed and power.
• Achilles and Karna, already locked in a dangerous spear duel, are distracted by the sudden spread of Atalanta’s Noble Phantasm; Karna’s brief shift in attention eases the pressure on Achilles.
• Semiramis awakens disoriented but methodically reconstructs events. She suspects the mysterious newcomers may be responsible for her confinement, though she has no proof.

Significant themes

• Rage and endurance: Atalanta’s fury sustains her through pain but also pushes the fight toward greater destruction.
• Escalating conflict: Battles overlap, and a single attack expands into a threat to multiple combatants.
• Uncertainty and survival: Semiramis’s unexplained survival and strange surroundings leave her—and the reader—without clear answers about what happened.

Key plot points

• Semiramis awakens in a pristine, unfamiliar space and realizes it is beyond ordinary magecraft: it has no discernible magical traces and offers no obvious escape.
• Number One arrives and tells her that “we” are keeping her alive because her Noble Phantasm is valuable. He supplies the exact materials needed to construct it and orders her to complete it there. When she tries to press him for answers, he leaves, warning that escape is impossible.
• At 3:55 a.m., Atalanta’s battle against Xiu Er ends. After the protective shield drops, Atalanta attacks with giant arrows and a surprise assault, but Xiu Er counters, pins and binds her, then strikes with the Pseudo-Codex Gokurokugai. Atalanta is defeated, and Xiu Er leaves through a Space Gate.
• At 4:00 a.m., Xiu Er returns through a golden passage, setting up a new experiment.

Character developments and interactions

• Semiramis shifts from investigating her prison to recognizing how completely outmatched she is. Her confusion and alarm deepen when Number One reveals knowledge of her Noble Phantasm and provides its components. She remains determined to ask questions, but he refuses to engage.
• Number One is controlled and matter-of-fact. He treats Semiramis as a resource rather than an enemy to be questioned, explaining only enough to ensure she complies.
• Atalanta fights with increasing fury after Xiu Er’s shield vanishes, but her aggression cannot overcome Xiu Er’s superior defenses and abilities.
• Xiu Er remains calm throughout the confrontation, efficiently evading Atalanta’s attacks and ending the fight decisively. The passage does not clarify Atalanta’s fate beyond her defeat.

Significant themes

• Powerlessness and control: Semiramis is trapped and forced into a task; Atalanta’s fierce resistance is likewise contained by Xiu Er.
• Knowledge as power: The captors’ precise understanding of Semiramis’s Noble Phantasm underscores their preparation and advantage.
• Instrumental treatment of people: Semiramis is spared because she still has “value,” while the battle’s opponents are handled as mission targets.
• Uncanny technology and mystery: The unexplained prison, teleportation gates, and automated mission messages suggest forces and systems beyond the characters’ understanding.

Key plot points and events

• Karna completes his fight in the forest, where Number Nine informs him that the mission is over and leads him back through a Teleportation Gate.
• The chapter then rewinds to just before Number Nine defeats Achilles. Number Four returns to Number Two’s Boundary with Karna, whom she has persuaded to follow her.
• Number One, Number Two, Number Three, Number Four, and Number Seven are gathered in the Boundary. Number One has come to propose an experiment; Number Two confirms the original has approved it.
• Number Four reads the experiment’s details. Number Two assigns Karna to assist Number Nine with the mission and directs him to ask her for instructions. Karna sets off toward the workshop in the Boundary.

Character developments

• Karna accepts Number Four as his master and agrees to cooperate with the other Xiu Ers, though he remains reserved and initially struggles to distinguish them.
• Number Four acts as Karna’s guide and clarifies that he should treat the Doppelgangers’ instructions as if they came from her.
• Number One is energetic and eager to experiment, but her history of failed proposals makes her sisters distrust her ideas.
• Number Two manages the group’s discussion and gives Karna his assignment. Numbers Three and Seven reinforce the group’s skepticism toward Number One.

Significant themes

• Shared identity and individuality: The Xiu Ers are the same person, yet their different numbers, personalities, and timelines give them distinct roles and relationships.
• Trust and obedience: Karna’s willingness to follow Number Four—and to accept instructions from her counterparts—shows the unusual trust forming between them.
• Order versus improvisation: Number Two tries to keep the conversation focused, while Number One’s enthusiasm repeatedly threatens to derail it.

Character interactions

• Karna’s awkward pause before calling Number Nine “Master” reveals his uncertainty about addressing the identical Xiu Ers.
• The Doppelgangers banter over Number One’s proposal record, with Numbers Two, Three, Four, and Seven all questioning her judgment.
• Number Two addresses Karna formally, while Karna looks to Number Four for confirmation; her reassurance establishes that the group operates as a unified authority in his eyes.

Key plot points and events

• Karna leaves the Boundary through a newly opened Golden Vortex, carrying an earpiece so Number Nine can communicate with him.
• After he departs, the five Xiu Ers discuss their planned “Illegal Summoning.” They believe their analysis of the Great Holy Grail gives the experiment an 89% chance of success.
• They create a summoning circle and use a doll shaped like Xiu Er as a catalyst, intending to summon a specific Servant as the sixteenth participant in the Holy Grail War.
• Because the Boundary lacks leylines, the Xiu Ers supply the ritual’s magical energy themselves. Number Two performs the incantation while the others monitor the process; Number One distractingly plays music during it.
• The ritual succeeds, producing a sixth Xiu Er. The event also causes a change in the outside world, noticed by Xiu Er and Shiro Amakusa while they are fighting.
• The newcomer identifies herself as a Doppelganger distinct from the others. She chooses the name Foreigner, or F, and explains that this is her current class. Number Two sees that the class translates locally as Descender, an unknown category, and consults the Codex of the Whispers.

Character developments and interactions

• The five Xiu Ers’ shared identity is emphasized: they bicker and cooperate like facets of one person, and Number Four’s approval settles the group’s doubts.
• Number One is impatient and excitable, even interrupting the ritual with music. Number Two is more disciplined, managing the summoning and reacting with exasperation.
• Number Three, Number Four, and Number Seven serve as calm analysts, tracking the ritual’s stability and confirming the result.
• Foreigner shows independence from the group by rejecting their numbering system and choosing her own name. Number Two becomes her Master and begins investigating her unfamiliar class.

Significant themes

• Identity and individuality: Foreigner resembles the other Xiu Ers but insists her different circumstances make her distinct.
• Rules, loopholes, and experimentation: The Xiu Ers exploit the Grail’s mechanics to create a Servant beyond the usual roster.
• Knowledge and control: Their understanding of the Grail and use of the Codex let them reproduce a complex ritual themselves, though Foreigner’s class remains unexplained.

Plot points and events

• An experiment conducted by the Xiu Ers unexpectedly alters the world. The change is significant enough for those outside their Boundary to sense it, though the group inside initially missed it.
• Number Two uncovers new information in the Codex of the Whispers: references to Chaldea, Singularities, and the Human Order. The Xiu Ers conclude their experiment succeeded, but incomplete data caused the result to differ from their predictions.
• Number Nine returns with Karna and confirms she sensed the change. Karna notices that the Xiu Er standing with the group is also a Servant, though unlike any he has encountered.
• After sharing the new information, the Xiu Ers decide to test the manifested individual’s abilities. Number Two opens a vast virtual combat arena.
• The narrative shifts to Xiu Er fighting Shiro Amakusa inside the arena. Amakusa, exhausted and unable to understand the world’s anomaly, asks what she did. Xiu Er consults the shared database, learns that the Xiu Ers’ experiment appears to have caused a Singularity, and recognizes Chaldea’s arrival as a likely future development.
• Xiu Er decides to finish dealing with Amakusa before addressing Chaldea. She sends a Doppelganger to make contact and then resumes her attack.

Character developments

• Xiu Er and her Doppelgangers remain analytical despite the unexpected outcome. Their shared database lets them rapidly compare findings and adapt, while Number One continues to show her usual exuberance.
• Number Two takes charge of the investigation, identifies the new information, and initiates the ability test.
• Number Nine demonstrates the Doppelgangers’ sensitivity to changes in other worlds.
• Karna is surprised by the unfamiliar Servant who resembles Xiu Er and her sisters, but stays back while the group confers.
• Shiro Amakusa is physically strained and increasingly uncertain. He had feared Xiu Er came to stop his plans, but realizes she is primarily interested in fighting him.

Significant themes

• Unintended consequences: The experiment works, but missing data produces a major deviation from the expected result.
• Knowledge and adaptation: The Xiu Ers use shared reports and rapid analysis to respond to an unforeseen crisis.
• Conflicting priorities: Though the Singularity and Chaldea may bring greater events, Xiu Er focuses first on the immediate fight.
• Observation and intervention: Multiple characters detect the world’s change, but interpret it differently according to their knowledge and abilities.

Character interactions

• The Xiu Ers exchange findings through their network, with Number Two directing discussion and Number Three identifying the likely cause of their earlier failure to notice the change.
• Number Nine asks the group what happened, while Karna questions Number Four about the unfamiliar Servant; she directs him to the shared reports instead of explaining aloud.
• In the arena, Amakusa questions Xiu Er during a pause in their battle. She gives him no immediate answer, studies the reports, then attacks again without warning.