Succubi

Succubus (female) or Incubus (male) is a subcategory of Demons, a supernatural entity from folklore, fantasy and video games known to seduce the opposite gender counterpart. Depending on the various mythology involved they usually have some magical powers. One shared common trait is that their kisses are fatal, another that they can only be defeated by either being conquered in bed or by resisting the urges which they induce.

Also see: Wikipedia article about Succubus

They are a relatively common theme in VRChat being popular avatars that many players choose to use.

Aside from folklore they also borrow tropes and aspects from their DnD (Dungeons and Dragons) counterpart.