1girl, ahoge, animal_ear_fluff, animal_ears, arknights, arm_up, armpits, arms_behind_head, bare_arms, bare_shoulders, bikini, black_bikini, blue_eyes, blue_sky, breasts, closed_mouth, cloud, cloudy_sky, collarbone, day, extra_ears, eyebrows_hidden_by_hair, grey_hair, hair_between_eyes, hair_ornament, hairclip, hand_up, horizon, looking_at_viewer, navel, ocean, oripathy_lesion_(arknights), outdoors, see-through, shirahari, sky, small_breasts, solo, sussurro_(arknights), sussurro_(summer_flower)_(arknights), swimsuit, tail, water, wet, wet_hair, x_hair_ornament