Mizushina Shizuru is the high school student president of Seiou High School. Ever since she became president, many school regulations were revised, were less violated by students and she earned trust among the teachers. She tries her best to change the school in the best interests of the students. Shizuru is often confessed to by boys, but they are turned down as she is too busy with school and student council issues to think about love. She is described as having a cold and drifting perfect aura, works very hard and many people look up to her. Shizuru, along with vice president Ichinose Ran are nicknamed "dog's stroll" because Ran is always running after the president with the spirit of a faithful dog.