二階堂 明

He is the son of a famous architect. When he was 17, he rebelled against his father, left home, and joined the Midoriya Group. Because of this, he is trying to build a relationship with Tatsuki and Tappei. Incidentally, he doesn't like talking to them about running away from home. The other workers don't understand the theories behind his job the way he does, but when he talks about the data and mechanics of construction he gets Tappei's fist. His frankness doesn't mean that he is conceited, but it often leads to misunderstandings. His fellow workers think that he and Tatsuki make good rivals. [From TV Tropes]