![Kouji Satou](https://cdn.noitatnemucod.net/thumbnail/400x400/100/00c5c9051048ebe9173c7cb08df6323f.jpg)
Kouji Satou
佐藤浩二
Mr. Stein known in Japan as Professor Kouji Satou, is a Duel Academy professor only seen in the third season, though flashbacks indicate he was there in the first year seeing as Chumley appears in one of them. A former Pro League duelist who came from a poverty-stricken family, Mr. Stein fosters a grudge towards Jaden for ruining the interest of other students in his lectures due to the boy's lazy approach to lessons. He once dueled The D but fell ill before being able to complete the match. (This was because he was forced to study to become a teacher. He was so exhausted he could not continue. According to his flashback when Stein could no longer duel professionally "Scar-Knight" "transformed into a bitter hardened version of himself" creating the separate Scab Scar-Knight.) He prevents Jaden from reaching "Professor Viper" in the lab where the monkey Wheeler was trained, but is defeated. Afterwards, when he attempts to pick up his precious "Scar-Knight" card, he seemingly falls to his death into the abyss. In the English version, he is characterized as a parody of Ben Stein, particularly Stein's role in Ferris Bueller's Day Off.
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Yu-Gi-Oh! GX
Supporting (Role) TV
![Miyamoto, Mitsuru](https://cdn.noitatnemucod.net/thumbnail/100x100/100/0bc016acbe5c57a92c8e071074914212.jpg)
Miyamoto, Mitsuru
Japanese![Diraison, Marc](https://cdn.noitatnemucod.net/thumbnail/100x100/100/7c73613af9e39b229e1f7032fde187fe.jpg)
Diraison, Marc
English![Giraldi, Sílvio](https://cdn.noitatnemucod.net/thumbnail/100x100/100/37a076ef528e78ec397b6dc3851baf28.jpg)
Giraldi, Sílvio
Brazilian![Calindri, Gabriele](https://cdn.noitatnemucod.net/thumbnail/100x100/100/ef51704d3e243467ea064c73bc5801ce.jpg)
Calindri, Gabriele
Italian![Manet, David](https://cdn.noitatnemucod.net/thumbnail/100x100/100/cf40b3181b2b231d2e136380b2e6fcfb.jpg)