Appears in Ayatsuri Yashiki (Marionette Mansion). Yukihiko is the oldest of the Kitawaki kids. He and his family live in a truck and travel all over Japan, performing puppet shows. He is very skilled at it and his favorite puppet is Jean-Pierre, but feels that they are actually the ones controlled by the puppets, and not the other way around. Like Haruhiko, Yukihiko also wishes that they'd settle down somewhere and make friends; he eventually has enough of it and runs away from home.
Years later, Yukihiko gets in contact with Haruhiko and Natsumi again and invites them to his house — only for the two to discover that not only Yukihiko, but also his wife Sumire and his child Ayao, were being controlled by Jean-Pierre.
