zeriko, kagamine len, kagamine rin, vocaloid, highres, 1boy, 1girl, blonde hair, blue eyes, boots, brother and sister, character name, christmas tree, closed mouth, dress, full body, gloves, hair between eyes, hair ribbon, happy birthday, jacket, knee boots, long sleeves, looking at viewer, ribbon, shoes, short hair, shorts, siblings, sitting, sleeveless, sleeveless dress, twins, white background, white boots, white dress, white gloves, white jacket, white ribbon, white shoes, white shorts