1girl, alternate_costume, arknights, bagpipe_(arknights), bikini, black_bikini, black_choker, blue_eyes, blush, breasts, choker, hair_spread_out, hand_in_own_hair, horns, large_breasts, long_hair, looking_at_viewer, lying, navel, on_back, orange_hair, parted_lips, red_skirt, sideboob, simple_background, skirt, smile, solo, stomach, sweat, swimsuit, underboob, unworn_skirt, very_long_hair, white_background, yukiaka