One of the main characters of "Yu-Gi-Oh! ZEXAL" is a 14-year-old sophomore at Shinyuan City Junior High School with strong dueling abilities. When he first appeared, he was the school's top delinquent boy. He used a water-attribute shark-themed deck. Because of his calm and powerful dueling style and deck theme, he was known as "Shark". Both of his parents died, and he and his twin sister Kamishiro Risu depended on each other. He is a righteous man, and although he may have some disagreements in the early stage, he is actually a person who will risk his life for others. In the second issue, he remembered his true memory and mission as Naxiu, the leader of the Seven Balian Emperors. After that, they fought to the last minute to protect the Balian Realm. The real trump cards are No.101 Silent Honor Ark Knight and CNo.101 Silent Honor Dark Knight.