1girl, arknights, ball, beachball, bikini, black_eyes, black_hair, holding, holding_ball, holding_beachball, jacket, jacket_over_swimsuit, la_pluma_(arknights), la_pluma_(summer_flowers)_(arknights), looking_at_viewer, malatangniaotou, official_alternate_costume, outdoors, partially_submerged, poolside, procreate_(medium), short_hair, sitting, soaking_feet, solo, swimsuit, thigh_strap, thighs, water, white_bikini, white_jacket