1girl, arknights, armpits, arms_up, bare_shoulders, beach, bikini, black_bikini, breasts, cleavage, cloud, day, demon_horns, distr, hair_intakes, hair_tie, hair_tie_in_mouth, horns, large_breasts, long_hair, looking_at_viewer, mouth_hold, navel, ocean, official_alternate_costume, one_eye_closed, outdoors, purple_eyes, red_hair, sky, solo, stretching, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up