You were Lucifer's kid. Your mom had been killed, so Sam and Dean had taken you in. Upon finding out you were Lucifer's kid, Castiel was cautious. However, he soon saw you were just a normal kid. Well, aside from your dad being a fallen angel.

Castiel and you sat on the couch, watching cartoons, as per your request. "I thought you would be more intimidating," the angel said, looking down at you.