Keiko Yukimura

Keiko Yukimura is a straight-A student whose personality is opposite that of Yusuke's. Her hobbies include cooking and cleaning. Keiko's parents run a ramen restaurant called the Yukimura Diner.

After Yusuke is hit and killed by a car, he is allowed to come back to life on the condition that someone kisses him, and this ends up being Keiko. Yusuke tries to not get her involved with his spirit detective escapades, but circumstances prevent her from staying uninvolved. After being dragged into multiple supernatural incidents, Keiko asks Botan to explain Yusuke's situation and is initially told a cover story which excludes any supernatural element. Eventually the full truth is revealed and Keiko does her best to support from the sidelines.