1girl, arknights, arm_support, barefoot, bikini, black_bikini, breasts, choker, cleavage, closed_mouth, criss-cross_halter, detached_sleeves, feet, full_body, halterneck, hands_on_feet, horns, legs, long_hair, looking_at_viewer, medium_breasts, navel, official_alternate_costume, purple_eyes, red_hair, side-tie_bikini_bottom, signature, simple_background, single_hair_ring, sitting, solo, songchuan_li, spread_toes, stomach, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up, thigh_strap, toenails, toes, white_background, yokozuwari