Her relationship with Ritsu is an intriguing one. She puts up a front of hating him deeply, and wishing for nothing more than to see him fail. However, there are small moments that reveal possibly more intimate feelings, as she blushes deeply whenever he is near her or touches her, though she steadfastly denies caring for him. Starting in volume 3 and finishing in volume 4, she makes a bet with Ritsu that her older Zero pair, Yamato and Koya, can beat Ritsuka's Soubi. Ultimately, Yamato and Koya are defeated, and Nagisa's sibling rivalry-like attitude towards Ritsu continues. Also when Semei gouges out Ritsu's eyes she goes crazy, showing more than she probably intended of her true feelings for him, but still denies it when her Zeros make fun of her over it.