Rei Miyamoto  

, 宮本麗

Takashi's childhood friend and classmate, they have known each other since kindergarten. Although she initially promised to marry him one day, their relationship was strained due to his indecisiveness at the beginning of the manga. To resolve this issue, she started dating Hisashi, who was a friend of Takashi's. As time went on, they reconciled and Rei did not reproach Takashi for acting recklessly. Despite her headstrong nature, Rei is also reliable and skilled in combat. Although she was an excellent student in the same year as Saeko, her father - a police detective investigating corruption behind Shido's father - held her back on purpose. This has left her with a lasting grudge against him, which makes her feel uneasy whenever he is around. Currently, Rei and the group are searching for their parents after escaping from high school and resting at Saya's family mansion.