Takuto Tatsunagi is the main character in Cardfight!! Vanguard Season 2. He is the organizer of the Asia Circuit tournament and is the chairman of Tatsugami Foundation. Takuto is the top of the Tatsunagi financial group as well as the host of the Asia Circuit.

Takuto first appeared in the anime in Episode 57 during a flashback of Ren's history as Ren was having a Vanguard battle, Takuto was part of the crowd watching the battle. He also appeared in Episode 64, which he possessed Rekka. He explained the past of the World of Cray, where all of the clans are facing extinction, and the conflict between the Royal Paladin and Shadow Paladin clans.

He will make his other appearance in Episode 1 of Season 2, where he will meet Aichi for the first time.

He also appears in the manga, albeit much taller and in the company of Ultra Rare.