Allen Kōzuki

Allen Kozuki  (アレン, Kōzuki Aren) is a character in the Yu-Gi-Oh! ARC-V anime. He is a friend of Sayaka Sasayama and is a surviving resident of the Xyz Dimension.

Xyz Dimension Arc
Allen and Sayaka reunited with Shun, who got transported back to Heartland with Yūya, Shingo, and Gongenzaka. The three of them then looked for Yūya and the others, arriving in time to stop the Duel between Yūya and Kaito before it was too late. Along with Shun and Sayaka, Allen assured Kaito that Yūya and the others are allies, expressing his gratitude that bringing three new allies was extremely helpful for them. Despite these assurance, Kaito still refused to fight together with them and left the scene.