Kyouki is a Japanese demon and shapeshifter from the Shadow Multiverses and Shadow Lore. His name translates to "madness and insanity," perfectly reflecting the terror and torture he inflicts on his rivals and adversaries. Although a shapeshifter, his original form stands at five meters tall, with a completely black, unclothed body, long spiky hair, and an emotionless black-and-white mask. Kyouki has been portrayed in KOF-themed games using the M.U.G.E.N engine.