Mathmatica, known as Mathematica「マティマティカ」(Mattimatika) in the Japanese version, is the 10th-ranked Pro LeagueDuelist at the time of the Genex Tournament. He wears a red suit covered in numbers. During the Genex Tournament, he challenges Damon but loses. Prior to this, he is shown defeating several Duel Academy students, resulting in others actually running away to avoid Dueling him. He manages to catch up to the others, but ends up losing to Damon.
