The president of the Jindai High's Student Council. He is in his third year. He often considers Sousuke's behavior a reasonable response to the kind of situations he finds himself in, much to the frustration of Kaname; this is why he assigns Sousuke the job of Security in the Student Council. His behavior is calm and he is never seen angry. Sousuke and Hayashimizu share a mutual respect. He is also known for holding a white fan, on which various Japanese characters are written, with different words each time.