1girl, ar_gun, arknights, armpits, arms_behind_head, arms_up, bikini, black_bikini, black_choker, black_ribbon, blue_sky, breasts, choker, cleavage, closed_mouth, cowboy_shot, criss-cross_halter, day, detached_sleeves, hair_ornament, hair_rings, halterneck, long_hair, long_sleeves, looking_at_viewer, mouth_hold, navel, ocean, official_alternate_costume, outdoors, photoshop_(medium), purple_eyes, red_hair, ribbon, side-tie_bikini_bottom, sky, solo, star_(symbol), star_hair_ornament, stomach, sunlight, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up, thigh_strap, very_long_hair, water