The second in command to Ogen, Yakushiji Tenzen (薬師寺 天膳) is able to wrestle control of the Iga away from Oboro following Ogen's death to become Iga's de facto leader. Although his initial impression is of a pragmatic fighter concerned solely for the honor and future of his clan, Tenzen is actually a sadistic and malicious individual who revels in conflict and bloodshed. He fights with a ruthless tenacity and won't hesitate to involve innocent bystanders to guarantee a victory. He also lusts after Oboro and desires to take her for his wife in order to become the true lord of the Iga even if he has to rape her to do it, which he attempts at least twice over the course of the series.