1girl, ahoge, arknights, bare_shoulders, black_hair, breasts, cleavage, collarbone, fan_(ariku), grey_background, grey_eyes, hair_between_eyes, la_pluma_(arknights), la_pluma_(summer_flowers)_(arknights), large_breasts, looking_at_viewer, off_shoulder, official_alternate_costume, secretary_settings_(arknights), short_hair, solo, upper_body