He was portrayed by Yōichirō Saitō.
Tamotsu Douan is a researcher on Teiou University of Science and Technology.He describes as a talented researcher. But he never make any achieved breakthrough on his research, resulting others people ignore him and treated him like nobody.
As he gets frustrated, Ora showed up and telling him about a bad news and a good news. The bad news is that his research will never going anywhere, while the good news is that he still have a future if he decide to contract with her. Douan agreed with her, and take the power of Another Quiz.
After obtained Another rider power, Douan now as Another Quiz attacking fellow researcher to obtained their acknowledge. While he goes wild at the front of university, Sougo and Geiz came, resulting on him fighting Zi-O and Geiz. Homever, before Zi-O and Geiz can finish him, his son Mondo Douan interrupt the fight. Mondo then transform info Kamen Rider Quiz and engage a fight with Zi-O and Geiz. After beating up both of them, Mondo targeting his father next. Before Mondo land his punch, Ora interfere and rescue him.