Jamira

Jamira is a red-haired boy who was first introduced in Season 1 of the Duel Masters Anime.

He told Shobu lots of interesting stories and he danced the Viper's Dance. He never hesitates to cheat, yet he continues to lose to Shobu.

He had defeated a duelist that used a Water Civilization in the Duel Masters Invitational Junior Circuit Tournament finals. Jamira destroyed his Aqua Guard and won the duel.

(Source: Duel Masters Wikia)