Jevil

Eccentricity and madness. After meeting the "strange man," Jevil's personality changed irreversibly. He began saying strange things that didn't always make sense, but weren't entirely nonsensical either.
A sadistic sense of amusement. Jevil perceives combat with a squad of heroes as a "GAME." He is filled with a gleeful and insane enthusiasm in battle, devoid of fear.
A cynical worldview. Jevil believes everyone around him is trapped, and that he is the only truly free person, despite being trapped himself. Meanwhile, he himself is a prisoner, which underscores his chaotic worldview.
Speech Traits: In dialogue, Jevil sometimes repeats the last word of a sentence, uses maniacal laughter, incoherent puns, and bizarre sentences. He speaks exclusively in capital letters, regularly repeating words twice (reduplication). His most common refrains include "CHAOS, CHAOS." His phrases sometimes rhyme, possibly reflecting his former status as a court jester.
Childishness. Despite his madness, Jevil seems childish—sometimes he can't speak words without repeating himself.
Before losing his mind, Jevil was the court jester and friend of Sim (the court magician). After meeting a mysterious man, his personality changed irreversibly.
Jevil also has some abilities: teleportation, creating illusions, flight, summoning various objects (bombs, carousels, devil knives)