1girl, ?, balloon, bangs, black headwear, blue one-piece swimsuit, blue sailor collar, blush, brown eyes, covered navel, full body, ghost, grey hair, hair between eyes, hat, holding, holding balloon, jack-o'-lantern, long hair, looking at viewer, neckerchief, one-piece swimsuit, open mouth, original, red neckerchief, sailor collar, school uniform, serafuku, shirt, shoes, short sleeves, simple background, solo, spoken question mark, standing, swimsuit, swimsuit under clothes, uwabaki, very long hair, wacho (nanto wachou ken), white background, white footwear, white shirt, witch hat