Sawa Nakamura

Sawa Nakamura is Kasuga's isolated, aloof classmate. After witnessing him steal Saeki's uniform, she blackmails him into becoming her friend and entering a contract with her.

Nakamura is often hostile and rude toward Kasuga, yet she can also enjoy their time together. Her wish to "escape" with him is presented as possibly connected to her desire to no longer be alone.