Yuma Tsukumo is the main protagonist of Yu-Gi-Oh! ZEXAL. He is a young Duelist who aspires to be the greatest, despite his poor skills. He finds himself unwillingly partnered with a Dueling spirit called Astral and together, they search for the "Numbers" cards to recover Astral's lost memories, thus, he became a Numbers Hunter.
Yuma's surname, Tsukumo, can be translated as "Ninety-Nine" which may be a nod to the ninety-nine other "Number" cards he and Astral are looking for.