I’m taking a crack shot n saying I think Nightbringer might be Diavolo’s dad trying to prove a point since he didn’t expect his son to succeed as well as he did. (He has the free time)

I have no evidence other than they’ve mentioned Nightbringer was the first king of the Devildom multiple times n while his dad isn’t the first king that’s just the right amount of obscure history one could masquerade behind without to many ppl connecting the dots. (So obscure n yet mentioned it trice???)

Also they’ve subtly mentioned this mystery man on way more occasion’s than feels needed for someone not involved with the plot at all beyond lore. I wouldn’t shit my pants about it but we might even see him for a bit. Even if only in passing the way Micheal often is in OG- added in from time to time but never directly seen. (More in the tags cough)