1girl, arknights, back, bare_shoulders, barefoot, bikini, black_bikini, breasts, burnt_clothes, day, detached_sleeves, dutch_angle, from_behind, horn_ornament, horns, knees_up, large_breasts, light_rays, long_hair, long_sleeves, looking_at_viewer, looking_back, no.aei, official_alternate_costume, outdoors, purple_eyes, red_hair, see-through, side-tie_bikini_bottom, sideboob, sitting, soaking_feet, solo, star_(symbol), sunbeam, sunlight, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up, thigh_strap, water