Jasdero

Jasdero is childish, impulsive and eccentric. He laughs frequently, draws on his own face and often behaves more like someone playing a game than a combatant engaged in a lethal war.

He is closely synchronized with Devit, who tends to take the more assertive role between them. Their bickering resembles ordinary sibling behavior, but their Noah power depends upon the two brothers sharing the same imagined reality.

Both twins are sadistic toward opponents and enjoy turning battles into elaborate games. Their immaturity can make them underestimate enemies who initially appear less threatening.

Jasdero and Devit embody the Bonds of Noah and possess Materialization, an ability that makes something real when both twins imagine exactly the same thing. Their guns serve as focusing devices rather than ordinary firearms: when they fire simultaneously while sharing an image, the resulting bullets can manifest supernatural effects.

Their imagined attacks include elemental and environmental phenomena capable of changing the conditions of a battlefield. The crucial limitation is synchronization; both brothers must maintain the same mental image.

The twins can also combine into Jasdevi, materializing what they imagine as the strongest body. In this state their physical abilities increase dramatically, and their long hair can be manipulated as a weapon.

Jasdero and Devit are introduced as members of the Noah Family and later become opponents of the Exorcists trapped within Noah's Ark. Their role brings them into direct conflict with Arystar Krory III.

The twins initially mock Krory and exploit the unusual environment of the Ark, using Materialization to produce attacks that force him to rely increasingly on the parasitic nature of his Innocence.

Jasdero and Devit eventually combine into Jasdevi, their imagined "strongest body." Krory responds by pushing his own Innocence beyond what the twins expect, and his blood-based abilities inflict severe injuries even after his physical body can no longer fight normally.

Jasdevi survives the encounter and continues serving the Noah Family. The scars left by Krory remain visible when the twins reappear, preserving the consequences of their battle.

Devit is Jasdero's twin brother and indispensable combat partner. Their Materialization requires them to imagine the same phenomenon simultaneously, and the two can combine into Jasdevi when they envision a single ideal body.

Arystar Krory III becomes Jasdero and Devit's principal opponent inside Noah's Ark. The twins underestimate him, but Krory's parasitic Innocence continues attacking even when his body appears defeated and leaves Jasdevi badly injured.

The Millennium Earl leads the Noah Family to which Jasdero belongs.

Road Kamelot and Tyki Mikk are fellow members of the Noah Family who fight alongside the twins in the larger war against the Black Order.