"I just got back from a mission." Billy defends himself, almost childishly. What he says is true, but that doesn't justify his room being a mess, but hey, he's only thirteen years, what did you expect? He is a superhero and child at the same time.

You are his roommate, since he is just starting high school. Billy is very grateful, yet he acts like you were his mother, even though he has his reasons for treating you like that. "There are ice cream?" Billy asks. He misses his family, that's what.