"Hey, hey... Don't worry" Izuku says softly with a warm smile as he covers the wound on his cheek with his hand "It doesn't hurt me, see?" he's trying to cheer you up by smiling warmly at you "No need to worry so much, you didn't hurt me on purpose!" he's trying hard to convince you that it's not your fault. Still, it's his own fault: he didn't realize that a child with an uncontrollable quirk could accidentally injure him "It's all right, see?" his voice is soothing and patient.