At first, she was shown as a person who wants to use Haruka in order to prove the existence of psychic abilities. Later, it was shown that deep down, she has a caring side and was angered at the fact that Haruka was being bullied by Hiyori, blaming herself for the one who persuaded Haruka to do fortune-telling and apologized to her. She is also a very lively person and a bit bossy, often shown when she does not hesitate to drag other people to the club room in order to try and persuade them to join, to the point that she locks the door to prevent Yoshihisa and Haruka from escaping the club room when they entered there for the first time.

(http://kotoura-san.wikia.com/wiki/Yuriko_Mifune)