Miki Imaina

This character is the former partner of Yokokawa, who unexpectedly encounters the Oni-baku during the Valentine's Day Parade and shares an experience in a customized Koenig vehicle. She develops a connection with Eikichi, seeking his help from him to escape Yokokawa. Eikichi is subsequently confronted by Miki's three children, who strongly resemble Yokokawa, while she maintains a relationship with him and raises her family.