Tozen is the final boss of the Viking Story in For Honor's single-player campaign.
A legendary general among the samurai, Tozen was tasked with protecting the city of Koto. When the Vikings approached the front gate, inadvertently cornering themselves, Tozen led a brigade to attack them from behind. Even to the Vikings, it appeared that this was a killing maneuver but The Raider managed to defeat Tozen, inspiring the Vikings and causing the Samurai under Tozen to retreat and leave Koto open to plunder. Tozen was a formidable opponent and many warriors who fought Tozen were usually never heard from again. He has great strength and would sometimes call a volley of arrows to rain down on his foes. Before Tozen was killed by The Raider he acknowledges the Raiders fighting skills, but before he could finish he was struck by the Raider and plunged to the bottom of the small bridge. Upon seeing the death of their general, the Samurai retreated and the Vikings started to raid the city of Koto.
Though he is an honorable warrior, Tozen was not above using deception to fight his foes. When facing The Raider, he threw down a smoke bomb and sent in three orochi dressed as him to fight. Tozen is confident in his fighting abilities, especially his speed. When he realized he was losing to The Raider, he throws down a smoke bomb and retreats so he can shed his armor and move faster.