Bellatrix LeFaux

A witch of poisonous plants, she was born to a prince and a witch who was disguising herself as a fairy. Her mother attempted to keep up the ruse for as long as possible, but the now-king discovered the truth and had mother and daughter expelled from the kingdom when she was a little girl. Her mother raised her into believing that fairies had caused the witch/fairy divide, and now she wants revenge on behalf of all witchkind.

LeFaux was the surname her mother adopted after their exile, and thus passed on to Bellatrix. It's a cruel reminder of everything that fairies caused her to lose, but inwardly, she wishes that she was a fairy and could be regarded as a good person for existing.