Gyokko,an Upper Rank 5 demon in the 12 Kizuki.Previously a human named Managi,he had a grotesque appearance with a statue-like torso & multiple infant-like hands.In battle,he transformed into a merman-like form with fish-like scales & a serpent-like tail.Gyokko was excitable,arrogant, & narcissistic,often obsessed with his "art" & seeking Muzans approval. He was easily enraged when his art was insulted & displayed pettiness & jealousy,attacking Hotaru out of envy for his dedication for his work.