Yuzuki is brash and headstrong, sometimes even rude. She also lacks self-awareness and considers herself to be a kind, helpful, and benevolent person. Yuzuki has a way of being the one to make things happen in her environment; this can be seen in other characters' impression of her. Teachers chase and scold her, the basketball team fears her, and some friends like her but find her obnoxious. 

An abrasive, cocky voice would suit her well, but feel free to experiment.