1girl, ahoge, animal_ears, arknights, bare_shoulders, bikini, black_background, brown_eyes, brown_hair, choker, jacket, long_sleeves, looking_at_viewer, navel, off_shoulder, official_alternate_costume, open_clothes, open_jacket, parted_lips, roberta_(arknights), roberta_(summer_flowers)_(arknights), ruanpaiqijin, short_hair, simple_background, solo, stomach, swimsuit, tail, upper_body, white_bikini, white_choker, white_jacket