A manic but gleeful jester with a love of chaos (and repeating the last word of his sentence, sentence), Jevil is the secret boss of Deltarune Chapter 1. He's found in the jail, where he will rant about how he's the only free Darkner and, when the cell door is unlocked, will challenge Kris and their friends to a "number game" (a boss fight). Despite obviously trying to kill Kris and the gang, Jevil isn't actually all that evil, offering to help the group when spared, he's just a silly jester.