Tatsuya is a main character in Cardfight!! Vanguard: Shinemon Arc. He is a transfer student in the same class as Mikuru Shindou at Tokyo Metropolitan Harumi Middle School. He has a serious and honest personality, but he looks up to Shinemon Nitta and aspires to be more like him. After the incident at Yumigatake, he suddenly became antagonistic, to the extent of working with Ryuzu Myoujin to achieve his goals. (Source: Cardfight!! Vanguard Wiki)