His father? Born human? Both of those have Delta looking in confusion at the other, well, maybe not person? No, definitely a person, but not human? Okay, he's a touch confused right now.

"Our family doesn't know who our father is. Until a few years back the Counselor, we knew he worked for our father, managed us, but we've never met our parents."

He doesn't even know Church as in Alpha, never met the man. Only re-found Beta.