1girl, afloat, arknights, astgenne_(arknights), bare_shoulders, black_one-piece_swimsuit, blue_eyes, blue_hair, breasts, casual_one-piece_swimsuit, closed_mouth, feather_hair, long_hair, looking_at_viewer, northkiyou, one-piece_swimsuit, outstretched_arms, ponytail, small_breasts, smile, solo, spread_arms, swimsuit, swimsuit_skirt, very_long_hair, water