Juushirou Mouri is a male teenage character from the anime Jewelpet Happiness. He has green eyes and brown hair that reaches his neck. Juushirou is a young boy living in Japan with his parents and his younger sister, Akari, and is described as a kind and gentle person who loves animals, particularly cats.

His primary role in the story is explored in a specific episode focused on a table tennis tournament organized by Apel Yamada. Juushirou initially refuses to participate in this tournament because he harbors a deep-seated fear of the sport itself. It is at this point that he meets Tour, a male cat Jewelpet who represents the concept of adventure and has a deep love for nature. Tour holds a dim view of the city and its inhabitants, but upon learning of Juushirou's phobia, he decides to help the boy overcome his fear. Tour trains Juushirou, and the two form a bond with the goal of entering the table tennis tournament together as a team. The strength of their connection results in the creation of a Magic Gem, a significant event within the series that often represents a solidified friendship or understanding between a human and a Jewelpet. Throughout their interactions, Juushirou learns to become more confident and assertive.