In other worlds succubus may be discribed as female Demons, but not in the game 'Rise of a Hero' and my past life.
Succubus have two forms.
The one were they look like a beautiful human and the other were they have a black tail and black wings just above their hips.
Succubus here are a race that existed since the beginning of time with the other races that went extinct among the years, like..
Elves, dwarves, wolfman and mermaids.
There was a war seven centuries ago and the races that came out with surviors were succubus, humans and demons.
Since the humans and Demons had larger numbers than the succubus, they took all the land on the ground.
Since the succubus have wings, they took over a flying island called Jiar, which is hidden by many magic seals so that the outside world doesn't see it.
Succubus just use mana the same way, as normal humans, but they have a special skill that sets them apart from humans.