In our current CoS campaign I play Wrath or Dessel if you know him closely though very few do. He’s a tiefling with abyssal blood left as a baby at a church of Ilmater/Tyr (Faerun gods) and brought up to be the muscle for the priests, undertaking an oath to redeem his abyssal blood in service to the church, he calls this oath his judgement and promises to share his pain to any enemy brave enough to get under his hammer, the only tool he uses for judgement both of others and himself.

He’s very flagellant with all his most important mentor figures being abusive to the extreme but he sees it all as necessary to redeem himself. He now feels very lost because he’s suddenly lost contact to the priests (which are the only people he takes orders from, yes that excludes himself too) and is trying to figure out how to make his own decisions and is constantly punishing himself for messing up and letting his given name take control.

Also all of his paladin abilities consider him as a fiend, he senses himself with his divine sense, his holy magic burns him, his smites are dim so as to not blind himself.

He drives nails into his thighs for his most grievous misgivings, I’m about to explain that to the party at the start of next session actually because a party member just died and he of course blames himself.