Alright, bonus points for sass. He really doesn't see how Castiel can be so blind. Lucifer had nothing to do with manipulating these kids' personalities. They were all surly, heated-tempered teenagers without his help. He couldn't control them in that regards if he tried.

"I'm here now," he agrees, as though there was a chance he was just going to walk off and leave the kid. That never goes well for either of them. "Everyone and their books," he continues with an eye roll. For all he knows Elrond met up with Istredd then. "I have nothing better to do." He's people-watching and eavesdropping wherever he goes. Wilhelm doesn't need watching over. Probably. He's just overcautious, not distrustful.