Seven Elementals:
Daughter of the Fire King

Seven Elemental Courts with Seven Elemental Heirs, but five of them are imposters...

The rest are held prisoner in a court far beneath the continent, by a man who wants to rule all the land by himself and take revenge on those rulers he believes once slighted him.

No-one can touch the Fire King's Daughter, no-one can help free her from captivity. No-one that is except a man she swore never to forgive... 

Nova doesn't need help to free herself, but it would be a lot easier if she accepted it.