![Cobra](https://img.flawlessfiles.com/_r/400x400/100/dd/4b/dd4b72992dd8067723f2ca4c48b8fa10/dd4b72992dd8067723f2ca4c48b8fa10.jpg)
Cobra
コブラ
Professor Thelonious Viper, known in Japan as Professor Cobra, is a professor hailing from West Academy and the main antagonist for the first arc of season 3.
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Yu-Gi-Oh! GX
Supporting (Role) TV
![Schemmel, Sean](https://img.flawlessfiles.com/_r/100x100/100/ab/9f/ab9f7302acecde8677bb6023008b5370/ab9f7302acecde8677bb6023008b5370.jpg)
Schemmel, Sean
English![Takatsuka, Masaya](https://img.flawlessfiles.com/_r/100x100/100/2c/dd/2cdd895cc8ac176f8bf837a9a118c468/2cdd895cc8ac176f8bf837a9a118c468.jpg)
Takatsuka, Masaya
Japanese![Ubaldi, Pietro](https://img.flawlessfiles.com/_r/100x100/100/e4/cb/e4cbf0f20a01437800b936b36af81e53/e4cbf0f20a01437800b936b36af81e53.jpg)
Ubaldi, Pietro
Italian![Castro, Mauro](https://img.flawlessfiles.com/_r/100x100/100/b6/44/b6448fa13594f7c327a4648ebb335695/b6448fa13594f7c327a4648ebb335695.jpg)
Castro, Mauro
Brazilian![Reinhardt, Peter](https://img.flawlessfiles.com/_r/100x100/100/12/6b/126b1418170d0d6db4b0fa307c981984/126b1418170d0d6db4b0fa307c981984.jpg)