no, she's not a fan character. she was in the very first episode. her name is a fan creation, named for the derped up expression she had in the background, but she's an official pony design. just a recolor of rainbow dash, really.
she hates foxes because foxes hate her. not entirely her fault, dude. besides, she's sexy as hell, and her hate of foxes just resulted in a ton of fan art of her and ran having angry sex or overcoming their differences and getting together.
