1girl, arknights, barefoot, beach, bikini, black_bikini, breasts, cleavage, closed_mouth, drinking_straw, feet, hair_ornament, hammock, horns, legs, long_hair, looking_at_viewer, lying, ocean, on_back, outdoors, parfait, purple_eyes, red_hair, sandals, smile, solo, sq_(su_qing), star_(symbol), surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thigh_strap, toes