He demonstrates exceptional confidence both when playing football and thinking nothing of dressing as Sara Azuma and photographing himself in a selfie with Toi as he was breaking into a car. It is his suggestion to kidnap the real Sara Azuma and take her place in a fan meet and greet event, planning and taking part in the scenario. Kazuki cares a lot for his younger brother, messaging him each day in his Sara guise to give him the impression of a personal relationship with the star.