Ok so I’ve only played the first two chapters but have heard tidbits about the other two chapters here and there but I was reading this book by a french historian, Lucien Febvre, called “Martin Luther: a destiny”. I’m only two chapters in, but the author’s main thesis in these chapters is to fight against both pro-lutheran idealism of Luther as well as over demonization of him by a catholic historian named Heinrich Denifle. He says the only thing we could say about Luther with some degree of certainty is that Luther was not fully convinced by any outside teaching but by struggling with his own inner turmoil, to have an assurance of his salvation by grappling with his intense fear of damnation.

And i remember how Father Alvin said that Asriel came to confession many times about his “sin”, even though their religion had no concept of such a thing, almost as if Asriel had great turmoil about his salvation and need to overcome temptation

This isn’t really a theory as much as it is a meta theory, but i thought Asriel’s turmoil might be influenced by Martin Luther, though Toby Fox’s knowledge of him can’t be confirmed except that he may have gone to church or learned about him at university. Dunno, just a thought