Horse tail, definitely. Much closer to the character, and the fluffy tail would make you look like an anthro-furry, not a My Little Pony :>.
Maka Albarn; Soul Eater
Anarchy Stocking; P&SwG
Imp Midna; LoZ Twilight Princess
Megpoid Gumi; Vocaloid
Medli; Legend of Zelda Wind Waker
Goddess Madoka; Puella Magi Madoka Magica
Sasha Brauss; Shingeki no Kyojin
Originally Posted by sam vimes
Kōhai. Her name is now Kōhai.