  Harry watched her leave, keeping a close eye on her, as if she would turn around and attack. He'd done that a lot in the streets and mentally scolded himself whenever he didn't do it. Slytherin wasn't at all like the streets, a couple being more food and a roof, but it still held that one thing that was apparent on the street. It was a dog eat dog world. Satisfied that she wouldn't attack him he walked off to find Ron and Hermione.