Clevius

Clevius is Margaret Illenia's vice-captain and a commoner knight whose gratitude and possessive loyalty toward her become entangled with the Araxys cult's promise of a world without status. He serves competently within the Illenia Knights while secretly planning to kill Vanitas Astrea, and his premature betrayal kills a fellow knight, exposes the cult inside Margaret's order, and permanently changes both Margaret and Vanitas. (Chapters 28, 57, 74, 101, and 121–130)

Biography

Early Role and Commitments

Clevius serves as vice-captain of Margaret's order, fights in its coordinated demon-subjugation formations, and handles messages and practical concerns on her behalf. His loyalty begins in their university years: as a first-year commoner close to losing his scholarship and returning to the countryside, he watches Margaret endure a crippling injury, miss her father's funeral while comatose, lose her own scholarship, and work multiple jobs to graduate. He consequently treats the older student who helped him survive as the center of his allegiance, while directing his anger toward Vanitas, whom other students blamed for abandoning Margaret during the examination that injured her. (Chapters 28, 57, 74, 101, and 113)

That history turns ordinary concern into an attempt to control whom Margaret may trust. Clevius warns her that Vanitas does not change easily, openly glares at him during joint work, and confronts him at the university festival to demand that he stay away from Margaret. Vanitas answers with deliberate class humiliation, calling Clevius a commoner imitating nobles and accusing him of disguising romantic jealousy as protection. The exchange intensifies Clevius's existing resentment, but his later betrayal shows that the conflict is not created by one insult: he has already been recruited into Araxys by Aldred Haide and is hiding a political and religious commitment from the order he claims to protect. (Chapters 74, 77, 101, 113, and 122)

Later Conflict and Consequences

During the Red Moon operation, Clevius continues performing the role of a reliable knight. He cuts down demons beside Johanna, privately concedes that Vanitas's strategy has worked, and rotates smoothly through the front line against the Dullahan. Once the party is isolated, however, he abandons Johanna instead of answering her call to switch and separates Vanitas from the others. Clevius argues that killing Vanitas is the price of sparing Margaret, and that Araxys will break an aristocratic world so it can be remade with equal opportunity. His devotion to Margaret and resentment of rank therefore reinforce one another, even though she has neither consented to his bargain nor asked him to murder on her behalf. (Chapters 118 and 120–122)

Clevius injects or assimilates Dullahan blood, becomes a chimera strong enough to overpower Vanitas directly, and insists that every sacrifice is for Margaret. He kills Johanna and coordinates with Adrienne to leave Margaret unconscious but alive, intending their fabricated report to conceal the murders. Vanitas defeats and kills him through prepared terrain, spells, and gunfire; Margaret later finds the transformed body and learns that her second-in-command was a cultist. She and Vanitas suppress the betrayal publicly to preserve the newly certified order, but its members never fully recover. Clevius also acts earlier than Araxys's planners intended, disrupting their broader attempt to approach Vanitas and proving that his personal fixation ultimately damages both the woman and the cause he claimed to serve. (Chapters 121–130 and 141)

Appearance and personality

Clevius is physically taller than Vanitas and fights in knightly armor with a heavy blade. At the university festival he wears a tie that Vanitas pointedly straightens during their confrontation, but the corpus supplies no stable hair color, eye color, or more complete recurring description. His final body is greatly enlarged and visibly inhuman after demon blood transforms him into something Margaret initially mistakes for a Dullahan. (Chapters 101, 122, and 124)

As an officer, Clevius is dutiful, vigilant, and able to move in disciplined formation with comrades. Around Margaret and Vanitas, that composure becomes jealousy, class resentment, and a conviction that he knows what protection requires better than Margaret herself. He sincerely remembers the inequities both of them endured as commoners, but uses those memories to justify secrecy, murder, and an imposed bargain for her life. His tragedy is not a lack of commitment; it is the way he makes Margaret a “messiah” and turns loyalty into permission to betray her values. (Chapters 57, 74, 101, 118, and 121–125)

Magic and abilities

Clevius is an aura-using Crusader whose baseline strengths are heavy-blade combat, physical durability, and coordinated front-line tactics. His final transformation adds demonic power through Dullahan blood, but the corpus records no formal attainment rank or persistent stage progression before his death. (Chapters 57, 120–122)

Knightly aura and formation fighting

Clevius channels aura through his weapon and body, allowing him to cut down demons, close distance rapidly, endure wind-empowered strikes, and keep attacking after damage that tears through his armor. Within Margaret's unit, he specializes in timed rotations: one knight calls “switch,” the next intercepts the Dullahan's blow, and the exhausted fighter withdraws. This system distributes an Archdemon's pressure across several combatants and depends on trust and timing. Clevius's deliberate failure to answer Johanna's later call demonstrates its central limitation—the formation is only as reliable as the people maintaining it. (Chapters 57, 118, and 120–122)

Dullahan blood transformation

Demon blood changes Clevius's body, swells his physical power beyond Margaret's at that moment, and combines with his aura to make his blows bone-rattling and his blade capable of cutting apart incoming spells. It does not grant flawless defense or tactical awareness. Vanitas cannot win by trading force directly, but reshapes the terrain, plants circuits, redirects leaps with wind, attacks from irregular angles, and steadily herds Clevius into a prepared killing position. The transformation is therefore a temporary, corruptive combat enhancement rather than evidence of a mastered new discipline; Clevius dies in that form, and the corpse retains enough demonic alteration for Margaret to recognize the blood in his veins. (Chapters 121–124)

Relationships

• Margaret Illenia: Clevius credits Margaret with helping him survive university and builds his identity around serving her. He bargains for her life and calls her his messiah, but kills her comrade and hides a cult inside her order; discovering his body leaves Margaret grieving, guilty, and politically endangered rather than protected. (Chapters 57, 74, 101, and 121–125)
• Vanitas Astrea: Clevius blames Vanitas for Margaret's university suffering and treats his apparent reform as another future threat. Their class-laden hostility culminates in an attempted assassination; Vanitas anticipates the betrayal, isolates Clevius from the larger operation, and kills him after a prolonged fight. (Chapters 74, 101, 113, and 121–122)
• Johanna: Johanna fights beside Clevius as a trusted fellow knight and challenges him to acknowledge that Vanitas has changed. Clevius later refuses her combat rotation and kills her as part of the cover story protecting his bargain, making their former coordination evidence of the trust he violated. (Chapters 57, 118, and 120–125)
• Adrienne: Adrienne collaborates with Clevius during the Dullahan operation. Their deal leaves Margaret alive, assigns Clevius the killing, and plans a false account in which the Dullahan is responsible for the party's deaths. (Chapters 121–123)
• Araxys cult: Clevius embraces the cult's promise to destroy a status-bound world and rebuild it under one order. His recruitment by Aldred and use of demon blood make that allegiance materially real, but his early personal attack disrupts the cult's intended timetable. The corpus does not show a direct meeting or personal bond between Clevius and the Black Dragon itself. (Chapters 121–122 and 130)

Items

• No notable item associated with Clevius meets the scoped item-manifest criteria.