kumacchi, shugo seijo prism saber, game asset, large variant set, non-web source, official art, self-datamine, variant set, 1girl, :o, amagi mashiro, black one-piece swimsuit, blue eyes, blush, competition swimsuit, flat chest, gluteal fold, long hair, one-piece swimsuit, open mouth, pink hair, purple eyes, ribbon, simple background, solo, standing, surprised, swimsuit, tachi-e, transparent background, twintails, wide-eyed