female is succubus, the male is incubus and the one who is both is an omnibus or hermabus, but that's only my opinion
What about magicschoolbus?
If you are going off by D&D (Dungeons & Dragons) lore, a Succubus can turns into an Incubus, and a Incubus can turns into a Succubus, in the same lore, there are a very rare handful cases that, a Succubus does goes after a female human and can turns her clitoris into a cock for uses onto female humans, but like i said, that's a very rare.
Given the sexual flexibility of magic and even the real life Dungeon & Dragons audience, I wouldn't say it's that rare, especially since the Succubus is kind of a universal sex symbol. Off the top of my head, the only time I ever hear about an Incubus is when people mention the origins of Merlin. However, I imagine the wicked use of the Incubus or Succubus is relative to the sexual preference of their target.
In other words, an Incubus probably wouldn't go after a lesbian, and a Succubus would not likely attempt to chase down a homosexual male. I mean, obviously their erotic knowledge and shapeshifting would allow them too, but it just seems a little weird to not have a creature with a default gender use that to their advantage.
When the line is that aslong as ->she<- has a dick/balls that makes her a incubus=male. Then in that same context her breasts/bodyshape/female-face make her technically a succubus=female.
There are many ways of looking at it i gues. Just for me it sorta relates to reallife, where as i see it, a T-girl in general likes to be called a female.
These days, gender is defined by the individual, but if we're going on strictly technical terms, without the magic hocus pocus, they are probably an Incubus.
We could argue the details of their monstrous definition and origins all day long, or you can just accept my simple term for them:
hot.