Sora Perse
A young boy with a habit for sweets who comes to admire Yuya's dueling style and enrolls at You Show Duel School. He is also one of Zuzu's mentors. Sora can be impressed by another duelist who is as amazing as Yuya is. While initially thought to be a kind boy, he soon reveals himself to be a sadistic hunter from the Fusion Dimension who seeks to hunt Xyz users. In his Duel against Yuto, he is forcefully sent back to the Fusion Dimension when he revealed his true objective. After finding out that Leo is also targeting Zuzu, Sora revealed that he truly regards Yuya and Zuzu as his first true friends, so he initially decided to switch Zuzu with Celina, attempting to convince Yuya to go back to Standard Dimension with Zuzu so they won't be involved in the war. During his time at duel academy, he had classmates but made friends with none of them as everyone was training to be duel warriors in which Sora graduated while being at the top of his class.