Height: 155 cm (seasons 1-2), 160 cm (seasons 3-5).

A third-year middle school student, who lives in Kanazawa city of the country of Kaga. He is invited by Megumi Okura to Dreamland Wonder Hill, where he meets her friends, and encounters Vanguard for the first time.

Yuuyu uses a Dragon Empire deck based around "overDress" ability. One card among them, Trickstar, is known to be his personal buddy.