Of course he's welcome. There isn't a pack in the world that wouldn't welcome an omega like him in with open arms. Well... until they know he won't give them the offspring they want, naturally.

"Thank you, Sam. I appreciate your kindness. Then and now. You're... a good man. A good alpha."

A good mate, Castiel thinks. He deserves much better than what he gets from Zachariah.

"I've never been around many omegas. I was told they were... competition I should not associate with."