Jinko Sasajima

As the younger sister of Buzou High School’s quiz captain, Gakuto Sasajima, this mysterious girl first captures attention while riding on her brother's bicycle. After a chance meeting in the library, she forms a bond with Shiki after he shares his meal with her. Her passion for electronics is evident through her reading habits, suggesting she may be studying how to manufacture affordable buzzers, a hobby that Shiki and Daisuke find incredibly endearing.