Hanyūda Chizuru had gained sentience through the friendship between a Great Yokai and a human, becoming a Tsukumogami. She had also witnessed the Great Yokai's pain after his dear friend passed away. That was precisely why Hanyūda Chizuru decided to seal off her heart and avoid communicating with humans.
This was extremely difficult for Hanyūda Chizuru, but she endured it. She only needed to hold on a little longer, and then she would no longer have to endure anything, because her true form, the Hagoita, was about to be destroyed. For a Tsukumogami, once its true form was destroyed, it naturally vanished as well.
After all, that Hagoita had merely been an ordinary object. The fact that it had lasted until now before being destroyed was already remarkable, considering five hundred years had passed.
However, an accident happened at that moment. Yae Miko discovered Hanyūda Chizuru and overheard her talking to herself. Afterwards, Yae Miko used that Hagoita as the item to be searched for in the third round of the competition, forcing her to appear before humans.
In order to avoid dealing with humans, Hanyūda Chizuru used Yokai Power and illusions to try to scare them away. Yet she had not expected to encounter Lumine and Paimon, who mistook her for a companion of the three little yokai—the fox spirit, the kappa, and Hitotsume-kozō—and were not afraid of her at all. Then the detective Kazuha appeared and exposed Hanyūda Chizuru's illusion.
In the end, Yae Miko and Kamisato Ayato appeared and explained the reason behind it all. This test of courage had also been Yae Miko's final gift to Hanyūda Chizuru. Yae Miko had no ability to save her, so she could only let her leave without regrets.
At the same time, Yae Miko untied the knot in Hanyūda