1boy, 1girl, o, barefoot, baseball_cap, bikini, bikini_skirt, blush, bow, brother_and_sister, brown_eyes, brown_hair, dipper_pines, feet, finger_on_trigger, full_body, gravity_falls, halterneck, hand_up, hat, holding, holding_water_gun, legs_together, long_hair, mabel_pines, male_swimwear, navel, outstretched_arm, plantar_flexion, polka_dot, polka_dot_bikini, red_bikini, red_bow, short_hair, siblings, swim_trunks, swimsuit, tamaki_(tamaki599), toes, twins, water, water_gun, white_background