Astral (アストラル Asutoraru) is a mysterious entity in the Yu-Gi-Oh! ZEXAL manga, and one of the main protagonists, along with his comrade Yuma Tsukumo. Upon arriving in Yuma's world, his memories were scattered in the form of the 100 "Number" cards. While originally he only retained one of the "Numbers", he knew that when two or more "Numbers" confront in a Duel, they will fight each other to consume one another, allowing Astral to absorb defeated "Numbers" and regain pieces of his memories.