Yashiro Sazanka

Yashiro was Chiaki's former fiancée that was arranged by their parents. She is a gymnast at Biwa Academy. She got possessed by a demon because of her unrequited feelings for him. After she got released from the demon's possession by Jeanne, she confessed her feelings. Unfortunately, he turned her down. She marries Kagura and have twins, Celcia and Toki.

(Source: Wikipedia)