1girl, arknights, bare_shoulders, bikini, bird, black_bikini, breasts, choker, cleavage, hair_between_eyes, horns, large_breasts, long_sleeves, looking_at_viewer, navel, ocean, open_mouth, outdoors, purple_eyes, red_hair, sanmu, seagull, see-through, standing, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thigh_strap, wading