So many unanswered questions, who the hell was the pope and what’s the deal with the sec...

I think it’s clear the pope was that priest with the pink hair and blue eyes. He had holy power that almost rivaled the saintess, and any time that red hair guy (I’m not good with names) talked about the pope he described him as someone who loved the saintess even more than he did, which the pink haired guy said he loved her. He also doesn’t age which I believe is a product of having a lot of holy power, just how red hair guy doesn’t age as well. Plus pink haired guy kept trying to take her with him, and it was known the popes will was to get her to come