1girl, alternate costume, black background, black dress, braid, broken halo, cosplay, dark persona, dress, eyes visible through hair, from behind, hair ornament, halo, long hair, long sleeves, looking at viewer, looking back, parted bangs, parted lips, purple eyes, purple hair, side slit, sidelocks, simple background, single braid, solo, thigh strap, two side up, wide sleeves