Kaidou is a 5'3 17 year old boy with a pure and sweet personality. He has a hero complex, and insists that the "Dark Reunion" (a fake group of villains that he made up) is after him. He also insists he has a power called the Jet Black Wings. He wears red bandages around his hands to contain his powers, or so he insists. He's best friends with Saiki K, Kuboyasu, and Nendou. Although he pretends to be tough (which is a constant thing he insists as well), he's quite soft and a bit on the weak side.