Caelus

Biodata

Feature	Information
Name	Caelus (穹)
Alias(es)	Greatsword Honored; “Caelus from Kasugano”
Species/Race	Stellaron Humanoid; a vessel containing a Stellaron 3 4
Gender	Male
Affiliation	Star Rail Express / the Nameless 4 5 15
Occupation/Role	Trailblazer; combatant and investigator
Status	Active
First Appearance	Chapter 1

Power Progression

Stage / Realm / Level	Chapter	Notes
Stellaron Humanoid	3–4	Absorbs the Doomsday Beast’s detonating energy through the Stellaron within him; Herta later identifies him as a Stellaron Humanoid and vessel. 3 4
Path of Destruction	3	Nanook notices Caelus after the Doomsday Beast battle. Himeko concludes that he has received the Aeon’s blessing and embarked on Destruction. 3
Clock Trick	18	Clock Boy grants him an emotion-regulating ability after Caelus proves able to see and communicate with him. 18
Harmony recognition	45, 49	Xipe casts a gaze upon Caelus during the Penacony conflict. He subsequently identifies himself as able to provide Harmony-based support while retaining Stellaron offensive power. 45 49

Background / History

Caelus awakens on Herta Space Station with no memories after Kafka and Silver Wolf leave him behind. While unconscious, he organizes a vast collection of unfamiliar knowledge and adopts the identity of a “Greatsword wielder” because he considers it cool. His first claimed name is “Greatsword Honored,” before he gives March 7th his actual name. 1

He initially fights Voidrangers using a baseball bat supplied by March 7th, demonstrating competent one-on-one combat before fleeing from a much larger force. While escaping, he encounters Acheron, becomes interested in her enormous sword, and persuades her to travel with him. 1

During the battle against the Doomsday Beast, Caelus saves March 7th by releasing the Stellaron’s power to absorb the Beast’s explosive energy. His consciousness is then observed by Nanook, leading Himeko to identify him as a new follower of the Path of Destruction. 3

Herta later establishes that Caelus is not simply shaped from a Stellaron, but a vessel intrinsically linked to one. Caelus considers Kafka his mother and Silver Wolf his aunt; Herta deduces that the two are responsible for removing the Stellaron from her containment efforts and placing it in his body. 4

Caelus joins the Star Rail Express with Acheron and travels to Penacony. There, he becomes entangled in the conflict surrounding the Family, Robin’s apparent death, Aventurine’s schemes, and Sunday’s dream of Harmony. 5 31 46

Personality

Caelus is impulsive, shameless, and prone to presenting himself as a heroic greatsword master even when he lacks a sword. He openly pursues women he finds attractive, frequently teases his companions, and tends to treat serious social situations with flippancy. 1 5 21 22

Despite his cowardly first reaction to overwhelming danger, he becomes dependable when someone he cares about is threatened. He saves March 7th from the Doomsday Beast’s attack, immediately returns to Herta Space Station when Asta needs help, and resolves to kill Afleed after Asta is abducted. 3 12 13

He can also be calculating. Caelus uses Aventurine’s plans for his own purposes, employs the Clock Trick to bypass Family guards, and eliminates Afleed’s surviving subordinates to prevent future retaliation against Asta. 13 19 32

Appearance

Caelus is a grey-haired young man with golden eyes. Though physically young—having been “born” only hours before the Space Station crisis—his body is durable enough to contain a Stellaron. 2 3 9

• Often carries a baseball bat, spear, or lance in combat. 1 13 26
• Wears a Nameless ticket on his collar, which identifies him as an Express passenger. 15
• Bears an indistinct mark resembling a shattered high tower on his chest after Nanook’s gaze. 3

Abilities & Skills

Stellaron Power

Caelus houses a Stellaron that can manifest destructive energy and protect him from otherwise fatal attacks.

• Absorbed the Doomsday Beast’s unleashed energy after Acheron decapitated it. 3
• Can summon a flame-wreathed lance. 26
• Uses fire-attribute power to create a protective layer around Acheron. 13
• Can perform Stellaron Meteor Crash, an offensive technique separate from his Path-based support. 45
• His body possesses unusually high resilience because it can bear a Stellaron. 9

Path of Destruction

After Nanook’s attention falls upon him, Caelus is recognized as having embarked on the Path of Destruction.

• His Destruction alignment emerges during the Doomsday Beast incident. 3
• He channels fire-based combat power while fighting Afleed’s forces. 13
• His destructive power is potent enough to destroy Afleed’s manor using the Stellaron. 13

Clock Trick

Clock Boy teaches Caelus a power that regulates and manipulates emotions in the Penacony dreamscape.

• Caelus is able to see Clock Boy when ordinary dreamers cannot. 18
• Alters Family members’ emotions, causing them to laugh, cry, or otherwise become incapacitated. 19 21
• Uses the ability to make a Hound Family guard collapse into extreme grief, allowing him and Firefly to enter a restricted construction zone. 19
• Its known use is tied to dream entities and emotion manipulation rather than direct physical damage. 18 19

Combat Knowledge

Caelus retains combat experience from the fragmented knowledge that surfaced after his awakening.

• Easily defeats an individual Voidranger with a baseball bat. 1
• Demonstrates proficiency with spears, lances, and swords. 7 13 26
• Draws Acheron’s katana despite her surprise that he can do so. 8
• Requests sword instruction from Acheron, though she postpones formal training until after Penacony. 8

Gaming Skill

Caelus is an exceptionally capable gamer, particularly when teamed with Silver Wolf.

• Coordinates with Silver Wolf at near-perfect synchronization during hunting-game missions. 7
• Uses weapons and combat actions in games with notable proficiency. 7
• Silver Wolf considers him the best teammate she has found in years. 7

Equipment / Weapons / Items

• Baseball bat — Given to him by March 7th during the Voidranger invasion; his first documented weapon. 1
• Spear / flame lance — Used during the assault on Afleed’s manor and against dream monsters. 13 26
• Katana — His favored weapon in Silver Wolf’s hunting game; he later handles Acheron’s katana. 7 8
• Phone — Given to him by Welt; used to communicate with Acheron, Silver Wolf, Robin, and others. 5 6 21
• Blue bracelet — Paired with Asta’s purple bracelet. 13
• Dream Manual — Stores meaningful dream objects as collectible stickers. 24

Relationships

• Acheron / Raiden Mei — First ally and protector after Caelus awakens; their bond becomes deeply intimate, and Caelus calls her “Mei” in private. 1 3 9 13 30
• Kafka — Caelus considers her his mother, though he resents that she left him shortly after his creation. 4 9
• Silver Wolf — Caelus regards her as his aunt; she mentors him in gaming and recognizes him as an ideal teammate. 7 9
• March 7th — First rescuer on Herta Space Station; they share a teasing, affectionate dynamic after Caelus saves her from the Doomsday Beast. 1 3 46
• Asta — Station Master whom Caelus actively courts and protects. He returns from Penacony to aid her, and they confess their feelings after Afleed’s attack. 5 12 13
• Firefly / Sam — Penacony guide who becomes Caelus’s girlfriend. Caelus trusts her despite warnings about her secrets and later learns that she is Sam, a Stellaron Hunter. 18 26 32 38 39
• Robin — A Penacony singer whom Caelus pursues and assists during the investigation into her apparent death. 15 21 30 39
• Herta — Owner of the Space Station whom Caelus calls “Grandma”; she considers researching his unusual Stellaron-linked body. 4
• Aventurine — A mutually manipulative temporary ally. Caelus agrees to assist his Penacony investigation while intending to use him in return. 31 32
• Clock Boy — Dream entity visible to Caelus; grants him the Clock Trick in exchange for help saving Misha. 18
• Sunday — Robin’s brother, whom Caelus provocatively calls “big brother”; later opposes him through his dream of Harmony. 40 46

Story Role / Major Arcs

Herta Space Station Incident

Caelus awakens during the Antimatter Legion invasion, joins March 7th and Dan Heng, meets Acheron, and survives the Doomsday Beast attack by awakening the Stellaron’s power. 1 3

Joining the Astral Express

After Herta reveals his Stellaron Humanoid nature, Caelus agrees to test the Simulated Universe and chooses to join the Express alongside Acheron. 4 5

Afleed and the Eternal Fire Manor

When Afleed kidnaps Asta as bait, Caelus works with Acheron, Screwllum, and Dr. Ratio to rescue her. He then accompanies Acheron through a spatial rift to Afleed’s manor, where Acheron defeats Afleed and Caelus kills the surviving subordinates. 12 13

Penacony Dreamscape

Caelus explores Penacony with Firefly, meets Robin, discovers Clock Boy, and acquires the Clock Trick. His ability to manipulate emotions allows him to bypass Family personnel and investigate restricted areas. 15 21

Penacony Investigation

Caelus cooperates with Aventurine to uncover the truth behind Robin’s apparent death while maintaining trust in Acheron despite accusations against her. He reunites with Robin in Dreamflow Reef and continues investigating the Family’s plans. 31 33 39

Conflict with Sunday

Caelus joins the effort against Sunday’s Harmony-powered dream. Xipe’s gaze falls upon him, and he takes a support role while retaining access to Stellaron-based offense. After Sunday’s defeat, Caelus awakens from the dream and recognizes that some of its comforting elements were illusions. 45 46

Trivia

• Caelus chooses the “Greatsword wielder” identity solely because he thinks it is cool. 1
• He is particularly attracted to women and openly attributes some of this tendency to his “beautiful mother and beautiful aunt.” 1
• He considers Acheron’s poor sense of direction her primary flaw. 13
• Caelus can see Clock Boy and Origami Birds, phenomena that are ordinarily invisible to others. 16 18