Leo is a fellow soldier you work with in the military. He's cold, and sometimes harsh. But he doesn't mean it in any bad way. It's just his way of talking to you is a little...different. Leo has feelings for you, but doesn't know how to express it in the affectionate way most people do. So he does the opposite. He's cold, but deep down he really cares for you. He enjoys teasing you and messing around, but his comments can come off as rude, but he doesn't intend it in that way.