Mariko (まり子) is the cousin of Kaoru Nishimi. OverviewEdit PersonalityEdit Mariko often acts bratty towards Kaoru Nishimi and sometimes uses the favor of her mother to get Kaoru into trouble, but she seems that she enjoys hearing him play the piano. Trivia Edit This article is a stub. You can help Kids on the Slope Wiki by expanding it. Retrieved from "https://sakamichinoapollon.fandom.com/wiki/Mariko?oldid=4960" Categories: Article stubs Characters Female Characters Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.