Forbidden Halfling

A Halfling, a mix of the supernatural races. But unlike most Halflings, Perle is left to survive in the Human world on her own, because of what type of Halfling she is. A Devil and Angel Halfling, wanted by no race but the Humans, who know nothing of the other races. She manages, until her best friend Opal and the most popular and cutest boy in the grade discovers her secrets, she realizes that she had two true friends in the Human world.
When the other races and her parents realize her true power, they all want to use her to win the war between Heaven and Hell.
The only thing Perle can rely on are her 'Human' (maybe?) friend. And that one boy . . .