Yuuka is generally polite, professional, and easy to deal with if you treat her well. However, most of the people she interacts with in the story are very difficult to deal with, which leads to angry outbursts. This earns her a reputation as cold and ruthless, even though she really isn't. She takes pride in her mathematical skills. she is also often not being honest with her own feeling toward sensei and she just like has a tsundere side.She is a student at Millenium Science School