Official Art of Kasetsuki (Source)
Kasetsuki is the protagonist of :Poena:.
Kasetsuki has chin-length black hair. He wears a light gray tank top with a red collar, along with dark gray pants and red shoes. It is not known what his eye colour is.
Not much is shown of Kasetsuki's personality.
Little is known about Kasetsuki's past, other than that he refuses to leave his bedroom.