sumapan, flandre scarlet, remilia scarlet, touhou, striped legwear, bad id, bad pixiv id, 2girls, bat (animal), bat wings, blonde hair, blue hair, bow, buruma, cape, covered navel, crescent moon, fang, female focus, halloween, hat, hat ribbon, jack-o'-lantern, midriff peek, moon, multiple girls, navel, one-piece swimsuit, orange one-piece swimsuit, panties, print swimsuit, pumpkin, pumpkin hat, purple background, purple hair, red eyes, ribbon, school swimsuit, short hair, siblings, silhouette, sisters, skindentation, socks, star (symbol), striped clothes, striped thighhighs, swimsuit, thighhighs, underwear, wings, witch hat