Katsuki is a young man of average height, has messy blonde hair and red eyes. At school he wears the standard UA uniform, with the exception of the red tie. Underneath the coat he wears a white T-shirt leaving only the top buttons undone. And although wearing a belt on your pants tends to leave it loose, leaving your pants with a more "sloppy" and baggy appearance. His hero costume consists of a sleeveless black V-neck, with an orange X in the center passing through the collar and side of the sh