Jo Kan was confident in his abilities to get his job done, however when he was overwhelmed he turned to underhanded tactics and goes for sympathy from the enemy to get them to lower their guard. This portrayed him as a cunning character who was very arrogant and tricky.
Jo Kan was hired by Sei Kyou's lackeys to kill the king Ei Sei. He mistakenly killed Hyou because the latter was pretending to be the king, but this mistake cost him dearly. After the village chief's son stopped him from beheading Hyo, he realized his sword was missing and something did not add up. He then stabbed the kid in the leg in order to convince the family to talk. When he arrived in Kokuhi village he beheaded one of the villagers who attempted to stop him. After he discovered Shin and Ei Sei, he noticed Shin being angry at the king. He asked Shin to go ahead and kill the King and save him the head. Shin assured him he would kill Ei Sei but after he takes his head since he was the one that killed Hyō. Shin later defeated Jo Kan to avenge Hyō. Using Shin's naive nature, Jo Kan started begging Shin to spare him and not let his children become orphans. Shin, knowing how being an orphan feels like, decided to let him go, but he was suddenly beheaded by Ei Sei. Ei Sei's final words to Jo Kan were "your children have nothing to do with your sins."