1girl, animal_ears, ass, blue_one-piece_swimsuit, dog_ears, dog_girl, dog_tail, extra_ears, floating_hair, gun, hair_behind_ear, holding, holding_gun, holding_weapon, jacket, mecha_musume, no_pants, one-piece_swimsuit, ponytail, rifle, sakamoto_mio, school_swimsuit, solo, strike_witches, swimsuit, tail, underwear, weapon, white_background, white_jacket, world_witches_series, yonemura_kouichirou