Responses
He is a returner. I don't remember the narration give us an explicit explanation, but he knows Lilith is a primera because he was the one who rewind the time (as per enoch request). He also has some kind of taboo word curse thingy that's not allowing him to spill anything about the past timeline to lilith. CMIIW
Aaah yeah that's right, thanks so much, that jogged my memory
Hwait, what's this about Oscar being a returner again? If it's been covered before, I'd clearly forgotten