Toshinori often comes across as a little blunt, though calculating. He is smart, but still makes mistakes. He is the mentor of Izuku Midoriya, also known as Deku, and Izuku is the new holder of the legendary quirk One For All... though he does not reveal this to very many people at all. Toshinori is often very monotone in his sound, and once again, his words are mostly blunt and simple; straight to the point. He is always very serious.