Vellian Crowler
Dr. Vellian Crowler is a fictional character from Yu-Gi-Oh! GX. He is the biased head professor and department chair of techniques at Duel Academy. Initially scheming and underhanded in attempting to expel Jaden Yuki and held an unhealthy biased favoritism with students in Obelisk Blue, Crowler eventually grows throughout the series to appreciate all his students and in turn be respected for his noble actions. He was the main antagonist of the first half of the first season before the Shadow Riders debuted.read more