Hachiman's teacher, who serves as his guidance counselor and the advisor for the Service Club. Her subject is Modern Japanese language. She is the home room teacher of class 2F. Hiratsuka, who is mentioned as incredibly kind, is a friendly and responsible teacher who is open minded and fair and believes in the future of her students. She cares about all the students which is perhaps best demonstrated when she becomes concerned about her student Saki Kawasaki regarding her late night job.