1girl, arknights, bare_legs, barefoot, bikini, black_choker, breasts, choker, criss-cross_halter, halterneck, horns, long_hair, looking_at_viewer, lying, navel, official_alternate_costume, on_back, purple_eyes, red_hair, shiguangbai, side-tie_bikini_bottom, solo, stomach, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, sword, thighs, very_long_hair, weapon