Crystel

The self-proclaimed archangel of Vengeance  (she is a dark angel)

a highly intelligent dark angel, she has gems lodged into her skin that can do heavy damage and cause paralysis to angels in particular. (Demons only get injured from them) Her gems can turn into sharp spikes and she's able to inject them out like a porcupine, they do regrow back. 

She is a scientist, always doing experiments--and due to one experiment going "wrong", she looks the way she does due to that. She is also excellent at dancing, ballet in particular. Most of her fighting techniques revolve around dancing. 

Personality-wise, she only thinks about her goals and her needs, she may hurt friends along the way until she's able to get her best friend back. She may come off as arrogant and snooty, but once getting to know her, she tries her best to care for her friends--even if it means to keep them away while she does experiments, she doesn't want her friends affected by that. 

She's friends with Iris and Eerie, they technically went to school together. Danilo and Crystel are also friends--

oh yea she's also able to shapeshift and create shadow familiars

also

birds

she likes birds

she's based on white hawks