Using succubi as villains in a low-sexuality game

One of the players in my current group has a backstory that prominently features succubi as villains. I’d like to do something with that, but romance and sexuality are not a large part of the game. Per our Session Zero, these topics aren’t off the table, but the PCs aren’t generally motivated to sleep around, seek out romance, or do other things that would naturally bring them up. Two of the PCs are technically dating NPCs, but that mostly just means that occasionally we say things like:

GM (me): "Okay, you’ve killed the last troll and pocketed all the loot you could find. Where do you want to go next?"

Player 1: "We should probably return to town. We’ve got plenty of loot to sell and we haven’t been back in a few days."

Player 2: "Good point. When we get back, I’ll check in and see how [my girlfriend] Lily is doing."

Because this stuff isn’t a big part of the game, I’m not sure how to use succubi in an authentic way. A succubus’ primary ability is draining life with a kiss, but any flirty NPCs that I put in are likely to come off as suspicious from a metagame perspective. Now, I could just make this a background detail – e.g., some NPC is seduced and leads the PCs into a trap – but I want to explore my options first. Are there things that I can do to make a succubus’ life-draining kiss a threat in a way that won’t make the players immediately say, "this NPC who’s trying to kiss my PC must be a succubus or a vampire or something"?

(I’m mostly expecting Good Subjective answers, but I’m certainly open to other ideas.)

What is the in-universe explanation for why succubi, who were demons, became “neutral evil fiends” in 5e?

The Forgotten Realms wiki page on succubi tell us (specifically in footnote 1) that in 1e, 2e and 3.Xe1, succubi were chaotic evil demons, but then were retconned to be lawful evil2 devils in 4e and have now just been made into generic neutral evil "fiends" in 5e, presumably in an attempt to avoid contradicting any previous editions’ lore.

Does 5e give any sort of in-universe lore explanation as to why they are now neither devil nor demon? The 5e Monster Manual entry doesn’t really explain that besides briefly mentioning that they "can be found in service to devils, demons, night hags, rakshasas and yugoloths", again presumably to avoid contradicting any previous editions’ lore, but without explaining why this is now the case.

This is the second part, which was split out from another question; see: What is the in-universe explanation for why succubi, who were demons, became devils?


1 Actually, the footnote on the Forgotten Realms wiki page only says 3e, but I know it was still true in 3.5e because of Neverwinter Nights 2, which was a video game based on 3.5e. In this game they were considered demons, which is incidentally my introduction to D&D and why I consider succubi being demons to be what they "should" be.

2 I say "lawful evil", because that’s what a devil’s alignment is, but I’m aware that 4e changed the alignment system, so it might not be so accurate to claim they were "lawful evil" in 4e, but at the very least, in the context of D&D overall, they would have been considered lawful evil all the time they were considered to be devils.

What is the in-universe explanation for why succubi, who were demons, became devils, then became “neutral evil fiends”?

The Forgotten Realms wiki page on succubi tell us (specifically in footnote 1) that in 1e, 2e and 3.Xe1, succubi were chaotic evil demons, but then were retconned to be lawful evil2 devils in 4e and have now just been made into generic neutral evil "fiends" in 5e, presumably in an attempt to avoid contradicting any previous editions’ lore.

Unlike with the Shadar-kai, I believe there was supposed to be some kind of canonical in-universe lore reason as to why these demons became devils. What was that reason? I assume it appears in some 4e material somewhere? I’m only really familiar with 5e material…

Furthermore, does 5e give any sort of in-universe lore explanation as to why they are now neither devil nor demon? The 5e Monster Manual entry doesn’t really explain that besides briefly mentioning that they "can be found in service to devils, demons, night hags, rakshasas and yugoloths", again presumably to avoid contradicting any previous editions’ lore, but without explaining why this is now the case.


1 Actually, the footnote on the Forgotten Realms wiki page only says 3e, but I know it was still true in 3.5e because of Neverwinter Nights 2, which was a video game based on 3.5e. In this game they were considered demons, which is incidentally my introduction to D&D and why I consider succubi being demons to be what they "should" be.

2 I say "lawful evil", because that’s what a devil’s alignment is, but I’m aware that 4e changed the alignment system, so it might not be so accurate to claim they were "lawful evil" in 4e, but at the very least, in the context of D&D overall, they would have been considered lawful evil all the time they were considered to be devils.