masterpiece, best quality, amazing quality, 1girl, dark cave, black background, crystal cave, from behind, sitting, shy expression, blush, stalagmites, stalactites, 1girl, solo, no light, kessara_solcarne, crimson dress, crimson hair, black thighhighs, crystal wings, red eyes, wide sleeves, habit, short hair, looking back, hand on own wing, folded wings,

sketch, watermark, censored, mosaic censor, bad anatomy, missing fingers, extra fingers,