K.O. is the main protagonist of OK K.O.! Let's Be Heroes.
Physical Appearance
K.O. is a small boy who has tan skin and brown eyes. He has dark brown jagged hair that is somewhat in the shape of a square at the top and is held together with a bright red headband. K.O. wears a low-cut white tank top with a sleeveless blue jacket, which is his Gar's Bodega's standard uniform, and dark blue shorts. He also wears bright red wristbands, pink leg warmers, and is barefoot. He is also considered to be cute and adorable by many of his fellow friends and allies as seen in the series.
As of "Let's Fight to the End", after accepting T.K.O. as himself and fusing into a true single mind, both of K.O.'s headband and wristbands turn into more of a magenta color, a fang can be seen sticking out of the left side of his mouth, and the pointed areas of his hair are now messier.