1girl, ahoge, arknights, bikini, black_hair, blowing_whistle, breasts, feather_hair, goggles, goggles_around_neck, hair_bun, hair_intakes, hand_up, hidikan, jacket, jacket_over_swimsuit, la_pluma_(arknights), la_pluma_(summer_flowers)_(arknights), off_shoulder, official_alternate_costume, solo, swimsuit, upper_body, whistle, white_bikini