Gender Male Race Darkner Attribute Chaos / Chaos Likes Chaos Dislikes Boredom He perceives combat itself as a game, never stopping his laughter throughout the fight. Whenever he is hit, his neck springs out like a coil while he continues to laugh. However, whether he is truly serious about the battle or simply lacks endurance, he is the only boss in Deltarune who can be defeated using Pacify magic once he becomes tired. As a Joker, he can use attacks based on all card suits, often enhancing patterns like Rudinn's or Hathy's. He also utilizes a carousel pattern, which includes carousels featuring Everyman's face. Furthermore, he can use his unique weapon, the Devilsknife. True to his demonic nature, it is a massive scythe-shaped weapon; he appears to transform into the weapon itself to attack. He uses scythes that are redder and larger than the original, and even a colossal scythe that fills the entire screen. His ultimate move involves dropping Devilsknives that leave trails of light pillars across the whole screen. If defeated through combat, Jevil transforms into the Devilsknife, allowing it to be used as a weapon.

He is pleasant and sly. He uses Durandal and is a Grade 1 Fixer.

Age 38 Birthday January 1st Gender Female Affiliation Charles Office → Unaffiliated (Retired) Family Older brother Argalia Husband Roland Fixer Grade Grade 1 Fixer • The Black Silence (Color) She usually has a quiet personality and uses polite speech, but in flustered or urgent situations, she switches to informal speech and becomes a bold woman who clearly expresses her opinions. When she first met Roland and he tried to pick a fight, she got annoyed and punched him twice; when Roland threatened her, she wasn't intimidated and hit him again, leading him to call her a crazy bastard. Even right after the Elena subjugation, when she was worried Roland might be dead and shook him, she hit him again while swearing, saying that his shaking hurt even more. Also, unlike a typical Fixer, she appears to have a kind and affectionate nature.

Age 39 Birthday December 31st Gender Male Height 183cm Affiliation and Position Leader of the Reverberation Ensemble Family Younger sister Angelica Brother-in-law Roland Fixer Grade Grade 1 Fixer • The Blue Reverberation (Color) He speaks in a soft, sarcastic tone and calls everyone "friend," whether they are allies or enemies. Even when being insulted by various people or engaged in many fights, he simply laughs as if everything is beneath him.