Hanzo Hattori (服部 半蔵, Hattori Hanzō) is one of the heroes in Samurai Shodown that appears in every title of the series. He is based on the historical figure of the same name, who was a Tokugawa ninja and head of a clan in Iga (in various fictional mediums).
Like several other mythical incarnations, he is an old friend to Jubei Yagyu due to their ties to the Tokugawa clan. He also married a Koga ninja, Kaede, quelling a long feud between the two ninja clans that is often romanticized in the historical novel, "The Kouga Ninja Scrolls". He also appears as a secret character in the SNK Playmore game, KOF: Maximum Impact 2.
The legendary ninja in the service of the Tokugawa shogunate, and pretty much the enemy of anyone who opposes them. Hanzo's manner is that of the classic ice-cold, super serious ninja, though he is still good friends with Jubei and Yoshitora.
In the events of the first game, Hanzo witnessed his son Shinzo possessed by Amakusa and he sets off to rescue him, only managing to rescue his body, not his soul.
In the second game, he successfully retrieved Shinzo’s soul, but only after his wife Kaede sacrificed her life. He also makes a anachronistic appearance in KOF: Maximum Impact 2.
Hanzo is a serious and condescending man. He is often seen laughing at his enemies in a superior manner. He wants to fight worthy opponents and knows that his fate is to die in battle. Despite this behavior, he is actually one of the good guys.