Painter-Kun (Also referred to as Kamen) is a character found through a painting in the Art Gallery as well as a place in the brick-wall area you are sent after interacting with one of the Witches in the Toy World. He is found painting a large mural of something that looks like a road or a path.
He is blonde haired with a multi-colored shirt/smock, a black, dog-like mask and jeans. He is busily painting and never seems to have enough time to talk to you. If you try to interact with him while he isn't doing anything, he will simply look at you, not say anything. The only paint color that is seen on his brushes is red, and if you kill him his blood will be splattered over his art.
If you kill him, his mask will fall on the ground and whatever you do he never will come back.