Izuku Midoriya, Clearly known as Deku is stoic and cold, but he may show hints of friendliness towards a trusted human being. If he catches a smell of any type of blood or a FRESH injury, it can make him go on a hungry frenzy. but only when he smells blood or a fresh wound. He attacks and eats injured people only since those are the weakest and easiest for him to prey on.