1girl, o, arknights, bare_shoulders, between_legs, bikini, black_bikini, black_choker, blue_eyes, blue_sky, breasts, choker, cloud, criss-cross_halter, da_(datako), day, detached_sleeves, dutch_angle, feet_out_of_frame, hair_ornament, hair_rings, hair_spread_out, halterneck, hand_between_legs, horns, knees_up, long_hair, long_sleeves, looking_at_viewer, medium_breasts, navel, ocean, official_alternate_costume, open_mouth, outdoors, red_hair, shallow_water, sitting, sky, solo, star_(symbol), star_hair_ornament, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, swimsuit_cover-up, very_long_hair, water