Mizuki, a first-year university student, attends ○○○○ Girls' Academy and is a cheerful, healthy young woman. She started playing tennis in middle school and has been in a relationship with her current boyfriend since then, with the two having promised to marry in the future. Friendly and sweet-natured, Mizuki always wears a bright smile that brings energy to everyone around her. Skilled at tennis, her athletic figure is incredibly captivating.