perrine h. clostermann, sakamoto mio, strike witches, world witches series, artist request, official art, 2girls, black eyes, black hair, blonde hair, blue one-piece swimsuit, blush, eyepatch, feet out of frame, glasses, halloween, halloween costume, hat, holding, holding sword, holding weapon, jack-o'-lantern, jacket, katana, long hair, looking at viewer, military, military uniform, multiple girls, one-piece swimsuit, pumpkin, smile, standing, swimsuit, swimsuit under clothes, sword, weapon, white jacket, witch, witch hat, yellow eyes