I disagree with the first post, you cant say she is not a succubi, because they do not actually exist, therefore they could be anything(As long as they follow the basics like; female demon, sexy appearance, and a seducer(Seducing is hard to judge in a picture though). It is an opinion thing overall, to you, but it can be a succubi none the less. Ever played world of warcraft? The succubi has a whip in the game, maybe that would be better than a dagger, give her more of a sexual weapon rather than a dagger. Either way, you cant be told she is not a succubi. As long as she has the qualities of one, she is one, she has sexy clothing, and she is a demon, there you go.
Nothing really indicates that she is a warrior type, and warriors dont typically use daggers anyway, so the first poster's premise is flawed.
Just giving my input on that comment.
1. Typically a sexy female demon is a succubus.
2. Your image shows a sexy female demon.
3. Therefore, she is a succubus.