Alexander Carnahan is a antagonist in the Kaijudo: Rise of the Duel Masters series.
Alexander is the father of Carny and would often be disappointed in Carny whenever he ends up in trouble at school. Alex is said to help run the city of San Campion. What the public doesn't know is that Alex is secretly The Choten's largest benefactor and silent partner.
Alexander first appeared when he had just picked up Carny from detention during a parent-teacher conference and scolds him for his actions as witnessed by Raiden Pierce-Okamoto, Gabriel Wallace, and Tatsurion the Unchained (who were hiding behind bushes). When Raiden used Tatsurion the Unchained to sneak up on Alexander and try to set things right, both of them were surprised that Alexander knew about Tatsurion. As Alakshmi Verma, Razorkinder Puppet of Miasma Pit, and the Choten's Minions arrived, it turned out that Alexander is The Choten's largest benefactor and one of his silent partners.
After Carny got out of the creature world with Raiden and made it back to his house, Alexander was pleased that Carny made it back and decides that Carny is ready for his gift which happens to be one of the Choten's Gauntlets. The Choten introduces Alex to Nigel as his chief financial benefactor. He directs him to one of Alex's chemical factories, which provide Nigel with a chemical that he places in the Duel Masters' spy system so they won't spot The Choten and/or his allies. In the episode "Caught in the Spotlight," The Choten discusses Alex's plot to be a war profiteer by mass-producing his Evolution Serum. After Lucy leaks footage of Carny and Simian Trooper Grash on the Internet, Alex tries unsuccessfully to reach Carny, and sends Fingers and Heller to bring Carny to him. When Ray fights hard against Fingers, Heller, and Master Nigel, Alex breaks up the fight with Sword Horned. He orders Carny into the car so that The Choten can have Carny return to his base to be further trained and disciplined.