| Gou Tetsujo |
|Voice Actor|| 東谷篤門 |
|Signature Card(s)||Snake Tailcoat, Black Demon of Torture|
He has the habit of scaring his classmates with his ghost stories. One night after the class finishes really late he sticks with Katta and his group and tells them the story of the Seven Incredible Curses. Later he challenges Yohdel to a duel and defeats him, scaring him with his Snake Tailcoat, Black Demon of Torture.
Later it is revealed that Leo Hyakujuu and Nanmo Nai were helping him to create the perfect atmosphere for his ghost stories by playing a creepy piano tune and moving mannequins around. Afterwards Gou sends Katta and his friends to check the toilets that were supposedly haunted by the ghost of Hanako. However, after a small jumpscare it is revealed that Gou was the one masquerading as the ghost and Katta realizes that he was in 'wakamama mode' and challenges him to a duel.
During the duel Gou curses Katta with the Seven Incredible Curses which include the strategies of his Ghost deck:
- Mana Curse: Time Tripper, Shadow of Stagnation
- Deck Curse: Buchikudaki Hood, Shadow of Grinding's Gachinko Judge
- Hand Curse: Buchikudaki Hood's discard effect
- Shield Curse: Suffocation Cloak, Shadow of Atrophy
- Graveyard Curse: Ganaru Scream, Shadow of Screaming
- Reanimate Curse: Filefish Jacket, Shadow of Torture
- Trump card Curse: Snake Tailcoat, Black Demon of Torture
Leo Hyakujuu ● Maria Ave ● Gou Tetsujo ● Seitaro Gero ● Yamamoto Elegance Kumiko
Gennai Saiba ● Ragan Hiyama ● Yukiko Kamakura ● Ran Ohata ● Mei Midoriyama
Dan Danda ● Hiroshi Taihei ● Nanmo Nai ● Toriyama Siblings