Murasaki Kojirō (紫小次朗 or むらさき こじろう) is a third year student of Houryou High School. His debut in the Kunio-kun franchise took place in Downtown Nekketsu Baseball Monogatari: Yakyū de Shōbu da! Kunio-kun, where he takes the role of the captain of the school's baseball team. He has purple hair and is nicknamed "The Beautiful Swordsman". He has feelings for Gōda's sister Saori.
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