In the game story, Hanzo is partly modeled on Masanari HATTORI and works directly under Ieyasu Tokugawa as a ninja, and is actively involved in the Battle of Sekigahara and Siege of Osaka behind the scenes.
半分は実在の服部正成に基づいて徳川家康直々の忍者という設定になっているが、関ヶ原の戦いや大坂の役に参戦し暗躍している。