Airi is a second-year student of Yuihime Girls' Academy and the principal's daughter. She always gets the best grade among all second-year students. At first, she was against the plan for merge of two schools, and rejected male students from Kagamidai Academy, but she began getting along with them several weeks later. She was elected the class representative along with Shingo. She was born and brought up in an upper class family in the Old District, but she has lived by herself in a low-priced apartment in the New District since she attended Yuihime Girls' Academy. She lives in a simple life and often goes shopping to a local supermarket in the New District named Kume Mart to buy reasonable-priced food and daily necessities.