Shinpo Koto first introduces herself as Ichi's fiance, but she's actually only his younger sister. Koto doesn't really want to be Ichi's bride, she just looks up to him, especially since they live apart. He's the ideal man in her life and she wants to be just like him when she grows up. Mature, silent, sarcastic—Koto is almost a carbon copy of her older brother. But, though she may act almost three times her age, Koto's inner child does sometimes stand out, mostly when with Fuuko. She doesn't get along with Fuuko at first because she knew that Fuuko liked Ichi, but she eventually warms up to her, especially after noticing that she's much different than that "other girl", Iori.