Chris lately was thinking of his own role in the ship and how... useless he had felt especially after Cassie and Kawalsky's deaths but right now? He felt he needed some alone time which is why he was at the Obs Deck. That the area was occupied didn't really came as a big shock. These things happen. He wasn't really surprised that said occupant was Billy, he had an odd sleep schedule from what he knew of the younger teen. "Billy? What are you doing?"