Sensei Ty and Rudy have had a rivalry that lasted for years. He is the Black Dragons sensei and (possibly) the founder, and he hates the Bobby Wasabi dojo. The reason why that is is when he and Rudy were battling the "Ancient Clash of the Antlers", (to see who would be the Grandmaster's apprentice) the Grandmaster "tooted" Ty off his stump. The problem is that Ty thought Rudy was the one who "blew wind", making him to loose his concentration. Ever since then, Rudy and Ty have been enemies. In fact, he hates Rudy so much he made Frank cheat at the Advancement Tournament so the Bobby Wasabi dojo would lose. Kim says he is a cheater and a big baby for his actions. He is also the uncle of Julie.
He is willing to do whatever it takes to outdo Rudy and bring down the Bobby Wasabi Dojo. He is considered a tyrant, as when the Bobby Wasabi dojo was sold to him, his methods of training Jack and his friends were very abusive.