He is Genya shinazugawa, Little brother of Sanemi Shinazugawa. He is apart of the demon slayer corps. He does not have a breathing style but uses a gun. He can turn part demon by eating a demon, sometimes he stays in the form for fun. He is foul-mouthed and ill-tempered individual; a "lone wolf" who refused any help from others and did not show any interest in being polite or having any manners but is secretly sweet