Zane Truesdale, known as Ryo Marufuji in the Japanese version, is a skilled duelist in the Yu-Gi-Oh! GX series. He is a top student at Duel Academy and the elder brother of Syrus Truesdale. Known for his cool demeanor and strategic mind, Zane is highly respected by his peers. Initially, he specializes in Cyber Dragon-themed decks and is admired for his expertise. Over time, Zane faces personal challenges that lead to a darker transformation, making him a complex and compelling character within the series.