Tate, known as Tatsuya Yamashiro in the Japanese version, is a character in the Yu-Gi-Oh! ARC-V anime. After watching Yuya Sakaki duel The Sledgehammer, Tate quickly became one of Yuya's biggest and steadfast supporters, calling him "Onii-chan" as a sign of affection and respect (Japanese version only). He is enrolled in You Show Duel School and proved to be very knowledgeable and intelligent. Frederick once called him a human calculator.
Tate is a young boy with blue hair and shoes. He wears a white short sleeved shirt and brown vest, along with a watch and short khaki pants. Tate has purplish-grey eyes.
Tate truly looks up to Yuya and doesn't doubt his dueling and pendulum skills even when others do as seen in Episode 2 when Yuya loses to Zuzu. Tate sees Yuya almost like an older brother and after seeing him the Sledgehammer, decides to enroll in You Show Duel School.