From the My Hero Academia: Team-Up Missions! He can’t control his quirk- which releases a poisonous gas, he really wishes he could control his quirk and he doesn’t want to hurt people with his quirk. He’s a sweet, sad boi who cares deeply about others and doesn’t mean to hurt people. He’s a civilian, he’s been storing up poisonous gas in his body for years, he really just needs to release it all, kinda stressed out.