Chapter Summaries

Chapter summary

Key plot points and events

• In the cafeteria, Nero loudly announces that she understands what is happening, drawing attention to Fujimaru Ritsuka. Ritsuka feels embarrassed until Da Vinci intervenes and leads him away from the commotion.
• Da Vinci reminds Xiu Er not to enter people’s rooms without warning. Xiu Er accepts the correction and says she will adjust her behavior.
• Da Vinci asks whether the device Xiu Er placed inside Ritsuka was only a tracker. Xiu Er confirms it was used for tracking and surveillance, and reveals that she has already removed it. Using it to locate Chaldea, she transferred there and contacted Roman and Da Vinci before Ritsuka woke.
• Da Vinci leaves, asking Ritsuka to keep an eye on Xiu Er. He sighs, aware that her presence is already exhausting him.
• As they walk through Chaldea, Ritsuka explains that he is accompanying Xiu Er because he fears she might start a fight with another Servant. Xiu Er understands his concern and recalls Roman’s rule: she should not attack casually, and should get others’ consent before sparring.
• Xiu Er pauses to look out at the snowy Antarctic landscape. Ritsuka, now speaking to her more casually, asks where she wants to go next.

Character developments

• Ritsuka remains wary of Xiu Er’s strength and unpredictable behavior, but begins to see a more bewildered, almost endearing side of her. His concern gradually shifts toward ordinary curiosity.
• Xiu Er shows that she can accept guidance and follow Chaldea’s rules. Though emotionally reserved, she understands why others might worry about her and is not simply seeking fights.
• Da Vinci acts as a practical mediator, balancing amusement at Ritsuka’s discomfort with concern about Xiu Er’s conduct.
• Nero briefly adds to the cafeteria’s commotion, while her revealing outfit reinforces Ritsuka’s impression that Servants have an unusual sense of dress.

Significant themes

• Trust and boundaries: Xiu Er’s tracking device and unannounced room entry raise questions about privacy, while her willingness to follow rules offers a basis for trust.
• Power and restraint: Ritsuka fears Xiu Er may harm others, but she distinguishes purposeful sparring from violence and agrees to seek consent.
• Growing familiarity: Small, everyday interactions begin to soften the distance between Ritsuka and the enigmatic newcomer.

Character interactions

• Da Vinci corrects Xiu Er’s intrusive behavior and questions her tracking device; Xiu Er answers directly and cooperates.
• Ritsuka acts as Xiu Er’s guide and informal minder, explaining his concerns rather than simply restricting her.
• Xiu Er listens to Ritsuka, recognizes the reason for his caution, and continues exploring under Chaldea’s expectations.

Key events

• Fujimaru Ritsuka finds Xiu Er looking out through Chaldea’s windows and learns that, under an agreement with Roman and Da Vinci, she must be accompanied if she wants to inspect Chaldea’s equipment.
• Ritsuka relaxes, grateful that the staff have arranged safeguards while allowing Xiu Er to remain in Chaldea.
• As they look outside, Ritsuka recounts how he joined Chaldea: he went to donate blood, passed out, and woke up in a hallway. Xiu Er bluntly suggests he was kidnapped; Ritsuka admits the idea seems plausible.
• Xiu Er appears willing to hear more, so Ritsuka begins describing his experiences restoring Singular Points.
• Mashu arrives with Fou. She introduces the creature to Xiu Er, who quietly examines him and secretly uses her head ornament to consult the Codex of the Whispers.
• Fou suddenly bolts. Xiu Er shows little concern, and Mashu reassures her that Fou often runs off. Ritsuka encourages Mashu not to be so formal around Xiu Er, who confirms she does not mind.
• Mashu notices that Xiu Er now seems much calmer than she did when they first met. After a brief exchange, Mashu leaves, and Xiu Er turns her attention back to Ritsuka.

Character developments and interactions

• Ritsuka is friendly and eager to connect with Xiu Er, sharing his history and casually describing her as gentle despite knowing her for less than a day.
• Xiu Er remains reserved and literal, but her attention to Ritsuka’s story and her calm reassurance to Mashu suggest a growing willingness to engage with Chaldea’s people.
• Mashu has moved from wariness to cautious ease, though Xiu Er’s formidable strength still makes her nervous.
• Fou reacts strongly to Xiu Er and flees, leaving the reason unclear.

Significant themes

• Trust and restraint: Xiu Er’s agreement to be accompanied allows Chaldea to manage the risks of hosting her.
• Connection through stories: Ritsuka uses personal memories to bridge the distance between himself and Xiu Er.
• Appearance versus character: Xiu Er’s fearsome power contrasts with her calm, considerate manner in this scene.
• Unusual beginnings: Ritsuka’s possibly involuntary recruitment highlights the strange circumstances of life at Chaldea.

Chapter 163 Summary

Key plot points and events

• Fujimaru Ritsuka continues recounting his experiences repairing Singularities, picking up from his encounter with a black version of Jeanne. Xiu Er listens and records his account, occasionally supplying reminders when he loses his place.
• After more than three hours, Ritsuka finishes the story session. Xiu Er has provided him with water through her dimensional ability, and he appreciates her help.
• Ritsuka jokingly describes the exchange as friends helping each other. This leads to a conversation about what friendship means to Xiu Er and whether she has friends.
• Xiu Er confirms that she has had friends. Ritsuka mistakenly assumes she means her fellow “dolls,” such as Number One, and apologizes for making assumptions. Xiu Er does not take up the apology and moves on to explore Chaldea.
• Ritsuka continues acting as her guide. Xiu Er openly watches the passing Servants, attracting their attention and prompting several to approach, question Ritsuka, or join the tour. She causes no trouble, but her curiosity keeps Ritsuka busy.
• They eventually reach Chaldeas, the blue, Earth-like sphere that appears to show faint signs of burning. Xiu Er studies it silently for about ten minutes while Ritsuka waits and falls asleep.
• Xiu Er wakes him by asking whether he is close with the other Servants.

Character developments

• Ritsuka is relaxed and trusting around Xiu Er: he drinks the water she provides without hesitation and shares his past at length. He also realizes he has made assumptions about her and apologizes sincerely.
• Xiu Er shows interest in human relationships and the people around her, even though she approaches them analytically. She listens attentively, observes the Servants, and quietly examines Chaldeas, but remains difficult for Ritsuka to read.
• Their rapport grows more comfortable, though they interpret friendship differently and do not fully clarify what Xiu Er means by having friends.

Significant themes

• Friendship and misunderstanding: The chapter contrasts Xiu Er’s precise, conceptual understanding of friendship with Ritsuka’s more personal, informal use of the term.
• Trust and reciprocity: Their story-and-water exchange is framed as a reasonable transaction, while Ritsuka would rather regard it as friends helping one another.
• Curiosity and connection: Xiu Er’s direct attention to the Servants and Chaldeas reflects her ongoing effort to understand this unfamiliar place.

Character interactions

• Ritsuka narrates while Xiu Er listens, records, and helps him resume after interruptions.
• Their conversation about friendship exposes Ritsuka’s assumptions; his awkward apology shows his concern for how he has treated her.
• During the tour, Ritsuka manages the Servants’ curiosity about Xiu Er while she observes them without approaching or provoking them.
• At Chaldeas, Ritsuka waits patiently as Xiu Er studies the sphere, before she turns the conversation toward his relationships with the Servants.

Key plot points and events

• Xiu Er wakes Fujimaru Ritsuka after he falls asleep during her observation of Chaldeas. She confirms the analysis is complete and asks whether he is close to the other Servants.
• Ritsuka says he considers the Servants his friends. Xiu Er accepts the answer but does not respond when he asks whether the two of them are friends.
• Xiu Er takes Ritsuka around Chaldea, using a route she planned after scanning the building. He realizes he is mainly there to satisfy the requirement that she be accompanied.
• Roman and Da Vinci observe the pair. Roman judges Ritsuka to be a decent person, at least so far.
• By her third day at Chaldea, Xiu Er has toured the facility and analyzed its devices. She has learned enough to approximate a reconstruction, but keeps her findings private. Her analysis suggests that Chaldeas—and perhaps Chaldea itself—is alive, a troubling possibility she wants to avoid getting involved with.
• Xiu Er asks Ritsuka when the next Singularity-restoration mission will begin. He is woken before dawn and learns that preparations normally take time.

Character developments and interactions

• Ritsuka is friendly and trusting, readily calling the Servants his friends. He is also considerate of Xiu Er’s need to follow Chaldea’s rules, even when he feels reduced to a “pass.”
• Xiu Er remains reserved and literal, but shows curiosity about Ritsuka’s relationships and quietly maps Chaldea’s systems. She avoids answering whether she and Ritsuka are friends, leaving their relationship undefined.
• Roman and Da Vinci discuss Xiu Er’s companion: Roman is cautiously approving of Ritsuka, while Da Vinci teases him.

Significant themes

• Friendship and trust: Ritsuka’s open-hearted view of friendship contrasts with Xiu Er’s guarded silence.
• Power and responsibility: Ritsuka respects Xiu Er for following rules despite her abilities.
• Hidden mysteries: Xiu Er’s discovery that Chaldea and Chaldeas may be alive hints at deeper dangers beneath the facility’s ordinary operations.

Key plot points and events

• Xiu Er questions Fujimaru Ritsuka about why Chaldea seems so unhurried despite humanity’s imminent destruction. He reminds her that only two days have passed and that the crisis is not being ignored.
• Ritsuka encourages her to get to know Chaldea’s people and make friends while waiting. Xiu Er rejects the idea as pointless, explaining that her past friends came to her as incidental “rewards,” not through deliberate effort.
• She argues that Ritsuka’s friendships are “cheap” too, since he is friends with so many people. He counters that his bonds with Chaldea’s Heroic Spirits are meaningful because they have faced hardships together.
• Ritsuka suggests Xiu Er join the group on their next Singularity so she can experience traveling with companions. He then asks her not to wake him so early again, and she agrees.
• At breakfast, Mash notices Ritsuka’s dark circles and worries about his lack of sleep. Xiu Er appears and gives him a colorless drink; Fou rushes out of the cafeteria after noticing something.

Character developments

• Xiu Er remains literal-minded and doubtful about the value of friendship, but Ritsuka’s suggestion that she travel with the group gives her pause. She privately recalls that she has traveled alongside others before.
• Ritsuka shows patience and empathy toward Xiu Er, while also revealing his exhaustion and desire for personal boundaries. His experience has taught him that companionship is built through shared hardship.
• Mash is caring and attentive, immediately concerned by Ritsuka’s condition.
• Fou reacts curiously to Ritsuka, then abruptly leaves after spotting something.

Significant themes

• Companionship versus solitude: Ritsuka believes shared experiences create meaningful bonds, while Xiu Er has treated relationships as incidental.
• Different perspectives on urgency: Xiu Er sees the crisis as demanding immediate action; Ritsuka relies on Chaldea’s ongoing efforts and takes a calmer view.
• Learning through experience: Ritsuka hopes Xiu Er will understand friendship by joining the group, rather than through explanation alone.
• Care and boundaries: Ritsuka patiently helps Xiu Er but asks her to respect his need for sleep.

Character interactions

• Ritsuka gently tries to redirect Xiu Er from her impatience toward socializing, and their debate exposes how differently they understand friendship.
• Xiu Er’s blunt logic briefly leaves Ritsuka speechless, but he answers with a personal explanation of his bonds.
• Mash and Fou show concern for Ritsuka at breakfast; Xiu Er’s arrival and unexplained drink introduce a new moment of curiosity.

Key plot points

• Xiu Er gives Fujimaru Ritsuka a sweet, homemade drink that she says quickly removes physical fatigue without side effects. Ritsuka drinks it despite some hesitation and is astonished when his exhaustion—and even his dark circles—vanish within seconds.
• Realizing that Xiu Er, a mechanical being, probably made the human-recovery potion for someone else, Ritsuka asks her to prepare five bottles for Dr. Roman, whose workload and poor health worry Chaldea’s staff.
• Xiu Er completes the request the same day. Ritsuka delivers the bottles to Roman, who initially mistakes them for ordinary energy drinks and plans to put them away.
• After hearing how effective the potion is, Roman becomes curious as a physician. Ritsuka explains that he requested it himself because Roman neglects his health. Roman tries to dismiss the concern, but Ritsuka’s insistence leaves him at a loss.

Character developments and interactions

• Ritsuka shows growing trust in Xiu Er by trying her homemade potion, then turns his concern for others into practical action by arranging help for Roman. His enthusiastic description of the drink makes him sound like a salesman, which briefly embarrasses him.
• Xiu Er remains composed and matter-of-fact, but her ability and willingness to make a highly effective recovery potion reveal a practical, quietly helpful side. She fulfills Ritsuka’s request immediately.
• Mashu is wary of using stimulants to fight fatigue and surprised by the potion’s rapid effects. She also recognizes why Ritsuka wants to help Roman.
• Roman is touched by Ritsuka’s concern, but his heavy responsibilities keep him from resting. He hides his exhaustion behind a reassuring smile and claims he knows his limits; Ritsuka sees through the excuse.

Significant themes

• Care expressed through action: Ritsuka responds to Roman’s overwork by finding a concrete way to help rather than merely urging him to rest.
• Trust and growing bonds: Ritsuka’s willingness to drink Xiu Er’s potion reflects the relationship he has built with her, while his request also shows confidence in her abilities.
• Self-neglect and responsibility: Roman’s commitment to Chaldea makes him ignore his own health, even as he encourages others to take care of themselves.

Plot points and events

• Fujimaru Ritsuka gives Dr. Roman bottles of Xiu Er’s restorative medicine. Roman says he’ll test it in his room, thanks Ritsuka, and asks him to thank Xiu Er. Ritsuka agrees and wonders what she is doing.
• Mashu finds Xiu Er standing in a corner with Fou, who is frightened and reluctant to be caught. Xiu Er explains that she is trying to capture him because she is curious.
• Mashu asks whether Xiu Er wants to hold Fou. Xiu Er gives her an intense stare, then calmly picks Fou up.
• Mashu asks why Xiu Er did not bring the other versions of herself to Chaldea. Xiu Er says they are busy, then summons Number One from her shadow.
• Number One arrives impatient and confirms she is busy. Mashu has no request to make, and Xiu Er has already left without her noticing.

Character developments and interactions

• Ritsuka shows concern for Roman and recognizes that Xiu Er’s medicine may be her way of apologizing for keeping him from resting.
• Roman is grateful but curious about how quickly Ritsuka and Xiu Er seem to have grown closer.
• Xiu Er remains reserved and literal, but her curiosity about Fou and her thoughtful gesture toward Ritsuka suggest care beneath her controlled demeanor.
• Mashu is curious about Xiu Er and her counterparts, but remains nervous around her—especially after their earlier confrontation. She tries to put Xiu Er at ease, then becomes flustered by Number One’s impatient manner.
• Fou is unusually fearful of Xiu Er, though he does not manage to escape her.
• Number One contrasts sharply with Xiu Er: despite their identical appearance, she is expressive, impatient, and evidently occupied with something important.

Significant themes

• Care expressed through actions: Xiu Er’s medicine serves as an apology, while her quiet concern is more apparent in what she does than what she says.
• Contrasts between identical selves: Xiu Er and Number One share an appearance but differ strongly in temperament.
• Misunderstanding and social awkwardness: Mashu and Ritsuka repeatedly interpret Xiu Er’s behavior in their own ways, while her restrained expressions make her difficult to read.

Plot points and events

• Number One realizes Mashu’s request was misunderstood: Xiu Er had summoned him because she thought Mashu wanted to speak with him. He reassures Mashu that the confusion is not her fault, advises her to be clearer next time, and leaves in a hurry through a Golden Passage.
• Mashu is left puzzled and cannot remember what she had originally intended to ask.
• That evening, Xiu Er confronts Fou in her room about avoiding her. Using a Magic that enables communication with animals—modified to translate Fou’s speech in Ritsuka’s manner—she learns that he stayed away because he sensed she was dangerous.
• Xiu Er reveals that she already knows Fou’s identity and information: he is Cassiopeia, the “Fourth Beast.” She explains that she is asking out of curiosity, not because she needs to investigate his past.
• While Xiu Er pets him using techniques from a downloaded guide, Fou relaxes and begins to open up, though he initially questions her interest in his story.

Character developments

• Number One shows restrained impatience but chooses to reassure Mashu rather than blame her, then promptly returns to his work.
• Mashu is apologetic and nervous around Xiu Er, but seems relieved by Number One’s calm response; afterward, she is still distracted and confused.
• Xiu Er displays her analytical, information-gathering nature, but also shows respect for privacy and genuine curiosity about Fou. Her unexpectedly gentle, skilled handling of him softens the encounter.
• Fou shifts from wary avoidance to cautious comfort. He remains suspicious of Xiu Er’s questions, but begins to trust her enough to talk.

Significant themes and interactions

• Miscommunication and reassurance: Mashu’s unclear request leads to an unnecessary interruption, which Number One resolves without escalating tensions.
• Knowledge versus privacy: Xiu Er already knows Fou’s identity, yet distinguishes between gathering information and asking someone to share their own past. Fou points out the contradiction in her earlier investigation.
• Intuition versus analysis: Fou’s suspicion rests on intuition, a basis Xiu Er finds difficult to assess.
• Trust through gentle interaction: Xiu Er’s calm questions and comforting petting help ease Fou’s fear, creating the possibility of a more open conversation.

Key plot points and events

• Xiu Er asks Fou why he stayed in Chaldea and invites him to share other past experiences. Fou hesitates, saying his past is painful, so she agrees to hear only his reason for staying. He begins his story.
• The next morning, Mashu worries that Fou dislikes Xiu Er because he has been avoiding her. She fears their two friends may fall out, while Ritsuka thinks Xiu Er would not be bothered by something so minor.
• After breakfast, Ritsuka and Mashu unexpectedly see Fou asleep on Xiu Er’s head as she strolls through the corridor. Their earlier concern proves unfounded.
• They stop Xiu Er to confirm that she knows Fou is there. She says her perception is functioning normally, and Ritsuka explains that they were simply relieved to see the two getting along.

Character developments

• Xiu Er shows consideration for Fou’s reluctance to discuss painful memories, while remaining unconcerned about his earlier avoidance. Her calm, literal manner continues to contrast with the others’ emotional reactions.
• Fou begins opening up to Xiu Er, despite initially avoiding her. The reason he stayed in Chaldea is about to be revealed, though his earlier past remains difficult for him to discuss.
• Mashu reveals how much she values both Fou and Xiu Er, worrying that they might dislike one another. Her anxiety eases when she sees them together.
• Ritsuka takes Mashu’s concern seriously and helps reassure her, while also showing that he understands Xiu Er’s indifference to minor social tensions.

Significant themes

• Friendship and reconciliation: Fou’s relaxed closeness with Xiu Er resolves the worry that they are at odds.
• Respect for painful memories: Xiu Er lets Fou choose what he is willing to share rather than pressing him.
• Different ways of expressing care: Mashu’s concern is openly emotional, while Xiu Er’s kindness is quiet and practical.

Character interactions

• Xiu Er gently invites Fou to talk, then accommodates his hesitation.
• Mashu confides her worry to Ritsuka; he offers a simple solution, which she rejects, and reminds her to eat.
• Xiu Er greets Ritsuka and Mashu while Fou sleeps on her head. Their astonishment and relief contrast with her matter-of-fact response.

Key plot points and events

• Fou is found asleep on Xiu Er’s head, suggesting the two have grown more comfortable around each other. Xiu Er insists there was never a conflict to make up over.
• Fujimaru tells Xiu Er that Roman wanted to thank her for the medicine she made. Xiu Er questions why, since helping Roman was Fujimaru’s idea and producing the medicine took little effort. Fujimaru says he also came to thank her himself.
• After three days of taking the medicine, Roman is unusually energetic despite his heavy workload. Da Vinci notices and investigates, learning the truth from Roman.
• Da Vinci summons Fujimaru, Mashu, and Roman for a mock-serious interrogation. Xiu Er happens to join them, and Fou appears in her lap.
• Xiu Er turns on the lights because the dim room could harm people’s eyes, ruining Da Vinci’s dramatic atmosphere. Da Vinci then asks Xiu Er not to give Roman that kind of medicine casually, leaving Xiu Er confused.

Character developments

• Xiu Er remains literal, practical, and emotionally reserved, but her easy acceptance of Fou’s presence shows a small shift in their relationship.
• Fujimaru continues trying to express gratitude and help Xiu Er understand others’ feelings, though their conversations still frustrate him.
• Roman’s improved energy reveals the medicine’s effect, while his willingness to tell Da Vinci the truth brings the secret into the open.
• Mashu is earnest and easily unsettled by Da Vinci’s theatrical interrogation.
• Da Vinci’s playful, dramatic side contrasts with Xiu Er’s matter-of-fact concern for safety.

Significant themes

• Different understandings of gratitude and effort: Xiu Er judges her contribution by how much work it required, while others value her help and intentions.
• Practicality versus social performance: Xiu Er repeatedly punctures others’ dramatic or emotional framing with literal reasoning.
• Growing companionship: Fou’s closeness to Xiu Er hints at developing trust.
• Care and responsibility: Roman’s improved condition is welcomed, but Da Vinci’s warning suggests the medicine may carry concerns or require caution.

Character interactions

• Fujimaru tries to credit Xiu Er for helping Roman, while she disputes that she deserves thanks; he also thanks her personally.
• Fou sleeps on Xiu Er’s head and later settles in her lap, quietly reinforcing their bond.
• Da Vinci interrogates Fujimaru, Mashu, and Roman theatrically, but the meeting becomes lighthearted when Xiu Er intervenes.
• Da Vinci’s request that Xiu Er stop casually giving Roman the medicine sets up a new question: why should she not?

Plot points and events

• Da Vinci reprimands Roman for using Xiu Er’s medicine to work continuously without sleep. Though Roman insists it has no harmful side effects and that Chaldea’s workload leaves him little time to rest, Da Vinci is concerned about what the medicine is doing to his habits.
• Xiu Er agrees not to give Roman any more medicine, leaving him to reluctantly abandon his attempt to keep working nonstop.
• Roman reveals that the group has been called together to discuss the next Singularity: the confirmed Sixth Singularity. Xiu Er is visibly eager to hear about it, while Ritsuka and Mashu quickly turn serious.
• After the strategy meeting, the others begin preparing. Xiu Er, who considers herself always ready for combat, wanders Chaldea with Fou and reflects on what she learned: the Singularity is set in thirteenth-century Jerusalem, is difficult for Chaldeas to observe, and is deteriorating into a void. Chaldea has classified it as EX-rank, meaning its conditions are largely unknown.
• Xiu Er says she is interested in the Singularity and promises to protect Ritsuka and Mashu. She can obtain information herself, but does not want to reveal her methods.
• Roman later approaches Xiu Er privately and leads her to an empty room. She assumes he wants more medicine and reminds him she has agreed not to provide it. Roman immediately denies that this is what he came to discuss; his real request remains unrevealed.

Character developments and interactions

• Roman is devoted to Chaldea’s work and willing to sacrifice rest, but Da Vinci’s intervention shows that others are concerned about the long-term effect of his habits. He later seeks Xiu Er out for a separate, private matter.
• Da Vinci acts as Roman’s caretaker and mediator, firmly protecting his well-being while also guiding the meeting and keeping its tone manageable.
• Xiu Er remains controlled but becomes animated by the prospect of a new world and the unknown Sixth Singularity. She respects Da Vinci’s request, keeps her own information-gathering abilities private, and commits to protecting Ritsuka and Mashu.
• Ritsuka and Mashu shift from casual observers to focused participants as the next mission is introduced. Mashu initially struggles to understand Da Vinci’s request to stay relaxed, while Ritsuka adjusts more readily.
• Fou accompanies Xiu Er and appears to question her about her intentions and abilities; their exchange suggests mutual trust, as Xiu Er believes Fou will keep her secrets.

Significant themes

• Work versus rest: Roman’s efficiency comes at the cost of healthy habits, prompting Da Vinci to set boundaries.
• The unknown and uncertainty: The Sixth Singularity’s EX classification underscores how little Chaldea can predict about the coming mission.
• Trust and privacy: Xiu Er’s conversation with Fou and her refusal to reveal her methods show that trust does not require full disclosure.
• Preparation and responsibility: Chaldea mobilizes for the next restoration, while Xiu Er frames her readiness in terms of protecting her companions.

Summary

• Roman asks Xiu Er whether she knows about Mashu’s health. Xiu Er confirms she has analyzed Mashu and knows that her body is deteriorating rapidly: she was created through illegal experimentation and has a maximum lifespan of eighteen years.
• Roman asks Xiu Er to stabilize Mashu’s condition. Though he cannot explain how he knows she might be able to help beyond calling it “intuition,” Xiu Er accepts. She notes that any treatment would require Mashu’s consent.
• Roman asks Xiu Er to keep Mashu’s condition from Fujimaru Ritsuka. Before she can respond further, Ritsuka appears at the door, having followed Roman and overheard their conversation.
• Ritsuka asks whether Roman really sought Xiu Er’s help to treat Mashu. His reaction suggests that he may already know about Mashu’s condition, despite Roman’s claim that she had not told him. Roman admits the secret has been exposed, possibly by both of them.

Character developments and interactions

• Roman reveals his deep concern for Mashu, setting aside his usual manner to ask for help. His appeal reflects both his trust in Xiu Er and his desire to protect Mashu.
• Xiu Er demonstrates her extensive knowledge and ability to assess Mashu, while remaining cautious about acting without Mashu’s consent. She also questions whether keeping the condition secret is wise, though she does not impose her view.
• Ritsuka shows concern for Mashu by following Roman and listening in. His response complicates the assumption that he is unaware of her condition.
• Fou reacts quietly during the discussion, appearing to understand or share awareness of Mashu’s situation.

Significant themes

The chapter explores trust and care, especially Roman’s willingness to rely on Xiu Er; secrets and communication, as well-intended concealment risks misunderstandings; and consent and autonomy, since Xiu Er’s ability to help does not mean she should act without Mashu’s agreement. It also highlights the ethical weight of Mashu’s origins as a product of human experimentation.

Plot points and events

• Roman’s earlier statement that Ritsuka “didn’t know” was technically true: Ritsuka knew about Mashu’s condition, but not that Roman had asked Xiu Er to help her. Xiu Er realizes Roman’s explanation was a word game and leaves him to talk with Ritsuka.
• Xiu Er goes to Mashu’s room to carry out Roman’s request to alleviate her symptoms before the trip to the Sixth Singularity. She uses Zafkiel’s time-reversal ability, firing an energy shot that rewinds Mashu’s physical condition by three years.
• The treatment works without injuring Mashu, who feels noticeably strengthened but is bewildered by how abruptly it happened. Xiu Er explains that the method is effective but consumes a great deal of energy; she also reflects that using Kurumi’s power to travel forward in time had depleted much of Kurumi’s stored time.
• Ritsuka hears the gunshot and rushes into Mashu’s room in alarm. Once Xiu Er points out his intrusion, he realizes he has barged into a girl’s room, retreats, and awkwardly explains that he was worried about Mashu.

Character developments and interactions

• Xiu Er remains blunt and efficiency-driven: she avoids lengthy explanations, performs the treatment immediately, and coolly questions Ritsuka’s sudden entrance. Her thoughts reveal concern about the cost of using time-based abilities.
• Mashu trusts Roman and accepts his help without complaint, but the sight of Xiu Er aiming a pistol frightens her. Afterward, curiosity and confusion replace her fear as she senses the treatment’s effects.
• Ritsuka shows strong concern for Mashu, rushing in at the sound of the gunshot. His panic gives way to embarrassment when he realizes how his entrance looks.
• Roman is absent from Mashu’s treatment, but his request—and his attempt to keep the request from Ritsuka—drives the chapter’s opening tension. Fou also appears concerned about Mashu.

Significant themes

• Care expressed through action: Ritsuka’s alarm and Roman’s effort to help Mashu show their concern, even when it is awkward or secretive.
• Trust and transparency: Roman’s evasive wording creates a small misunderstanding, while Mashu’s willingness to accept treatment reflects her trust in her companions.
• The cost of power: Xiu Er can alter Mashu’s physical state, but manipulating time demands significant energy and carries limits.

Key plot points and events

• Xiu Er tells Mashu that her treatment is complete. Ritsuka is startled by how quickly it happened, then rushes off to fetch Dr. Roman.
• Roman orders a full examination of Mashu, wanting to see the medical data for himself. Xiu Er thinks the extra testing is unnecessary, since she has already scanned Mashu.
• The results show that Mashu’s condition has improved dramatically: her body matches its state from three years earlier, including some minor symptoms from that time. Roman is astonished by the speed and scale of the change.
• Roman apologizes that he has no suitable reward for Xiu Er’s work. She says she has already been paid through the opportunity to explore Chaldea’s facilities.
• Roman asks about the gunshot heard during the treatment. Xiu Er produces her crimson-and-gold flintlock and explains that it is a “Casting Device.”

Character developments and interactions

• Xiu Er remains blunt, quiet, and intensely practical. She considers the examination and Roman’s apology unnecessary, but acknowledges his sincerity. Her matter-of-fact demonstrations and unusual treatment method continue to puzzle the others.
• Roman shows how deeply he cares about Mashu by personally checking her results. Though initially surprised by Xiu Er’s speed, he accepts the findings and relaxes once she confirms she considers Chaldea’s access to be fair payment.
• Ritsuka reacts with alarm to Xiu Er’s quick announcement and hurries to get Roman involved.
• Mashu accepts the examination and rests afterward, curious about her recovery. Her treatment brings Xiu Er, Roman, and Ritsuka together in a moment of shared concern.

Significant themes

• Trust and verification: Roman trusts Xiu Er enough to commission her, yet still needs to examine Mashu’s results personally.
• Care and responsibility: Roman’s hands-on concern contrasts with Xiu Er’s clinical, efficiency-focused approach.
• Different ideas of compensation: Roman feels indebted, while Xiu Er sees exploration—not material reward—as payment.
• The limits of explanation: Xiu Er’s abilities produce extraordinary results, but even a simple account of her device leaves much unexplained.

Plot points and events

• Roman tries to avoid work after several sleepless nights, but Xiu Er insists he is healthy enough to continue. Her stern watch makes him retreat, leaving her to keep an eye on the sleeping Mashu.
• Mashu wakes after about half an hour. Roman summons her and Xiu Er to the Spiritron Transfer Room, where Da Vinci begins the transfer to the Sixth Singularity.
• Xiu Er arrives alone in a vast, sand-swept desert. Unable to detect her companions, she deploys miniature reconnaissance drones to survey the area.
• Xiu Er contacts Fujimaru Ritsuka, confirms she is unharmed, and learns that he and Da Vinci have also landed in a desert. She locates their coordinates but chooses to continue reconnoitering rather than regroup immediately.
• During their call, Xiu Er hears combat and Magic Beasts in the background, suggesting Ritsuka’s group is already in danger.

Character developments and interactions

• Xiu Er shows concern for Roman and Mashu through practical supervision, while her sense of duty makes her prioritize reconnaissance over rejoining the group. She is calm and capable under unfamiliar conditions.
• Roman reveals his exhaustion and desire to slack off, but Xiu Er’s disapproval sends him back to work. He entrusts Mashu to her care.
• Ritsuka worries about Xiu Er’s safety and quickly deduces that she is scouting. His praise of her reliability reflects his growing trust in her.
• Da Vinci smoothly takes charge before the transfer, helping avert awkwardness between Roman and Xiu Er.

Significant themes

• Duty versus rest: Roman’s attempted break contrasts with Xiu Er’s insistence that responsibilities be met.
• Trust and care: Xiu Er looks after her companions, while Ritsuka’s concern and confidence show the group’s growing reliance on one another.
• Adaptability and independence: Separated in unfamiliar territory, Xiu Er responds with technology, reconnaissance, and clear communication rather than panic.

Plot points and events

• Fujimaru Ritsuka, Mashu, and Da Vinci land in the middle of a sandstorm and are attacked by a herd of Magic Beasts. As stronger enemies approach, Xiu Er offers remote support.
• Xiu Er has Ritsuka activate a hidden button on his bracelet, producing a targeting beacon. After the group throws it among the beasts, Xiu Er’s Angel, Metatron: Artelif, delivers a devastating precision strike that destroys the herd and clears the sandstorm.
• The blast’s shockwave throws the Chaldea team across the sand, but they survive. Ritsuka is stunned by the scale of Xiu Er’s firepower, while Mashu checks on his safety and Da Vinci recognizes the strike’s precision.
• Rather than join them, Xiu Er heads toward a cluster of enormous, palace-like pyramids in the desert. Her scans indicate unusually high magical energy and a life-sign inside, likely the structure’s master.
• Xiu Er approaches cautiously, but a dark-blue laser detects and destroys one of her small surveillance drones. She analyzes the attack, judges it unlikely to pierce her defenses, and descends to avoid exposing her position while reconsidering her approach.

Character developments and interactions

• Xiu Er demonstrates both formidable combat capability and careful, methodical judgment. She supports Ritsuka remotely because she has only his coordinates, and she avoids entering the pyramid’s airspace until she understands its defenses.
• Ritsuka follows Xiu Er’s instructions under pressure, using the beacon to direct the strike and warning Mashu and Da Vinci to evacuate. He is awed by the result.
• Mashu prioritizes protecting Ritsuka, carrying him away from the marked strike zone and checking his condition afterward.
• Da Vinci quickly understands that Xiu Er provided the attack, praises its precision, and confirms the team’s safety after the blast.
• The sequence highlights the team’s trust: Mashu and Da Vinci heed Ritsuka’s warning immediately, while Ritsuka relies on Xiu Er’s guidance.

Significant themes

• Preparation against the unknown: Xiu Er favors reconnaissance, analysis, and caution over rushing into an unfamiliar Singularity.
• Power and responsibility: Her overwhelming weaponry is effective, but its danger requires clear targeting and timely evacuation.
• Cooperation across distance: Communication and trust allow Xiu Er to support the group without being physically present.
• The limits of surveillance: The pyramid’s defenses can detect and destroy even a tiny drone, showing that Xiu Er’s technology does not make her omniscient.

Key plot points and events

• While investigating the pyramid, Xiu Er learns through the Codex of the Whispers that it is the Grand Temple of the Shining Composite, a residence and Noble Phantasm belonging to the powerful Sun King Osymandias.
• Fujimaru Ritsuka calls to report that Chaldea communications have failed again. Xiu Er directs him to a button that connects them to Roman’s channel, then ends the call.
• Xiu Er detects a group fleeing from the temple. Drone footage reveals that they are carrying a bound, unconscious woman. Though she had planned to avoid them, she decides to intervene.
• The group’s leader mistakes Xiu Er for an enemy sent by the Sun King. Xiu Er uses Gabriel’s music to incapacitate nine of the ten kidnappers; the leader resists briefly but is also knocked out.
• Xiu Er captures all ten for questioning rather than killing them, reasoning that they may have useful information. She frees the woman and, after confirming she is safe, transports her to Ritsuka’s group.
• The woman murmurs “Pharaoh” in her sleep. Xiu Er identifies her as Nitocris, Queen of Ancient Egypt’s Sixth Dynasty, stunning the others.

Character developments

• Xiu Er remains practical and emotionally detached, but her choices reflect her agreement to work with Chaldea: she avoids a direct assault on the temple, rescues the hostage, and preserves the kidnappers as potential sources of information.
• Ritsuka relies on Xiu Er for help restoring communications, while still reacting with weary humor to her decisive—and potentially excessive—methods.
• Da Vinci takes an investigative interest in the rescued woman, prompting Xiu Er to identify her.

Significant themes

• Power and restraint: Xiu Er could have attacked the temple or killed the kidnappers, but instead acts selectively and keeps future consequences in mind.
• Cooperation amid uncertainty: The group’s communication troubles and unfamiliar surroundings make Xiu Er’s information and abilities valuable to Chaldea.
• Appearances and hidden status: Xiu Er looks like a child despite her formidable capabilities, while the seemingly helpless captive turns out to be a queen.

Character interactions

• Ritsuka consults Xiu Er about communications; she gives a simple fix and quickly ends the conversation.
• The kidnappers confront Xiu Er, with their leader assuming she serves Osymandias.
• After the rescue, Ritsuka questions Xiu Er’s choice to capture the group, and she explains her action as defending justice.
• Da Vinci examines the sleeping captive, and Xiu Er’s identification of Nitocris leaves the group surprised.

Key plot points and events

• The Chaldeans examine Nitocris, whom Xiu Er rescued from kidnappers. Xiu Er explains that she deliberately kept Nitocris asleep, sensing that waking her too soon could cause trouble.
• Xiu Er lifts the sleep spell. Nitocris wakes to find Fujimaru Ritsuka, Mashu, and Da Vinci gathered around her, and assumes they are her captors.
• Nitocris accuses the group of kidnapping and drugging her, dismisses Ritsuka’s explanation that they rescued her, and summons dark creatures from her Underworld mirror to attack.
• Xiu Er suddenly appears behind Nitocris and binds her with a black chain before she can finish attacking. She then destroys the summoned creatures with a laser blast and seals Nitocris’s power with the Michael.
• The Chaldeans are left to manage the fallout: their attempt to explain the rescue has been undermined by Xiu Er’s swift capture of Nitocris.

Character developments

• Xiu Er proves highly capable and decisive, but her instinct to act immediately rather than negotiate creates complications. She remains detached and offers no explanation when Nitocris demands to know why her powers have been sealed.
• Nitocris moves from sleepy confusion to intense embarrassment, then righteous anger and combativeness. After witnessing Xiu Er’s overwhelming strength, she is briefly stunned, though she remains furious about being restrained.
• Ritsuka tries to de-escalate the misunderstanding and is concerned that Xiu Er’s actions will make the situation harder to resolve.
• Mashu recognizes Nitocris’s mirror and warns Ritsuka about the threat; she also quietly remarks on Nitocris’s stunned reaction.
• Da Vinci maintains her playful, quipping manner even during the confrontation.

Significant themes

• Miscommunication and mistrust: Nitocris judges the Chaldeans by the circumstances of her awakening and by her belief that kindness to strangers is rare in this world.
• Good intentions versus consequences: Xiu Er rescued Nitocris, but her forceful methods make the rescuers appear even more suspicious.
• Power and restraint: The encounter demonstrates Xiu Er’s overwhelming abilities and her willingness to neutralize a threat quickly, while raising the question of how the group can regain Nitocris’s trust.

Character interactions

• Ritsuka attempts to reason with Nitocris, but she refuses to hear him and attacks.
• Xiu Er bypasses the Chaldeans’ planned negotiation, restraining Nitocris and disabling her powers.
• Mashu and Da Vinci support Ritsuka, while the group’s reactions—especially his exasperation—underscore their concern that Xiu Er’s efficiency has turned a rescue into a diplomatic crisis.

Key plot points and events

• Nitocris wakes after being restrained and accuses Chaldea of kidnapping her. She rejects Fujimaru Ritsuka’s attempts to explain, convinced their actions and Mashu’s armor make them look like enemies.
• Ritsuka says they have proof and asks Xiu Er to provide it. Xiu Er releases the Chains, which remain tightly bound around Nitocris, then uses a flintlock-like weapon to transmit his own memories directly into her mind.
• The memories show Nitocris being kidnapped by men dressed like the neighboring Mountain People, rescued by Xiu Er, and brought to Chaldea. Realizing the group was telling the truth, she falls silent and breaks down in tears.
• Xiu Er frees her from the Chains but keeps her powers sealed. Nitocris remains on the ground, devastated by the ordeal and humiliation.
• Ritsuka recognizes that Xiu Er’s forceful “proof” has made the situation much harder to resolve. When Xiu Er declines to help further, Da Vinci volunteers to handle the negotiations.

Character developments and interactions

• Nitocris shifts from an angry, proud Pharaoh to a shaken and tearful figure after learning she misjudged her rescuers. Her status and dignity matter deeply to her, making her humiliation especially painful.
• Ritsuka acts as mediator, trying to reassure Nitocris and repair the misunderstanding. He becomes increasingly worried that Xiu Er’s methods have turned a simple explanation into a serious insult.
• Xiu Er remains pragmatic and emotionally detached: he uses an invasive supernatural technique because he considers it the most effective way to prove their innocence, then leaves the social fallout to others.
• Mashu and Da Vinci recognize that Nitocris is too upset to listen. Da Vinci steps in at the end, confident she can persuade her.
• The exchange between Ritsuka and Xiu Er highlights their differing approaches: Ritsuka prioritizes tact and relationships, while Xiu Er prioritizes efficiency.

Significant themes

• Truth versus the manner of proving it: Xiu Er establishes the facts, but his coercive approach worsens the interpersonal conflict.
• Dignity, rank, and humiliation: Nitocris’s royal identity shapes her reaction to being restrained and overpowered.
• Misunderstanding and trust: The group’s innocence becomes clear, but evidence alone does not immediately restore trust.
• Practicality versus empathy: The chapter contrasts Xiu Er’s results-focused methods with Ritsuka’s concern for how people feel.

Plot points

• Nitocris recovers from her earlier humiliation and realizes she misjudged the group. She thanks them for rescuing her and apologizes to Fujimaru Ritsuka.
• Still weakened by Xiu Er’s seal, Nitocris asks for her power back. At Ritsuka’s gentle request, Xiu Er unlocks it with a golden key, restoring Nitocris’s magical energy.
• While Ritsuka negotiates with Nitocris, Mashu and Da Vinci ask Xiu Er about her unusual ability to suppress an opponent’s power. Da Vinci jokes that Xiu Er’s many capabilities leave little for her to do.
• Nitocris agrees to guide the group out of the desert and provide supplies as repayment for their rescue and as compensation for her misunderstanding. Ritsuka asks for water and fruit; Da Vinci adds that the group could use a bath and rest.

Character developments

• Nitocris regains her dignity but also shows humility: she accepts responsibility for attacking the group and offers to make amends. Her embarrassment remains, especially over her defeat.
• Xiu Er remains outwardly expressionless and direct, but her interactions suggest she is becoming more comfortable with her companions. She follows Ritsuka’s request and restores Nitocris’s power.
• Ritsuka handles the reconciliation tactfully, avoiding blame and helping turn the encounter into cooperation.
• Mashu recognizes that Xiu Er seems to be opening up to the group and takes this as a sign that she now considers them companions.
• Da Vinci stays playful and curious, while also voicing a little mock frustration at Xiu Er’s versatility.

Significant themes

• Misunderstanding and reconciliation: Nitocris’s apology and the group’s restraint transform a hostile encounter into an alliance.
• Honor and accountability: Nitocris’s sense of status is balanced by her willingness to admit fault and repay a debt.
• Trust and companionship: Xiu Er’s gradual emotional change is noticed by Mashu, while Ritsuka’s considerate leadership helps build trust.
• Power and restraint: Though Xiu Er decisively overpowered Nitocris, she restores her abilities once the conflict is resolved.

Character interactions

Ritsuka mediates between Nitocris and Xiu Er, asking Xiu Er to undo the seal without condemning her earlier actions. Nitocris, still uncomfortable around Xiu Er, nevertheless acknowledges her own fault and offers compensation. Mashu and Da Vinci then approach Xiu Er with questions and teasing, and Mashu leaves reassured by the subtle warmth she senses beneath Xiu Er’s blank expression.