|Unstoppable King of Iron Fist|
|Full Name||Heihachi Mishima|
|Relationships||Kazuya Mishima (Son/Enemy)|
Lars Alexandersson (Illegitimate son)
Jin Kazama (Grandson/Enemy)
|Fighting Style||Mishima-style Karate|
- "It's been too long since I've enjoyed a fight."
Heihachi Mishima debuted in the first Tekken game as the first main villian and he has returned for all subsequent titles. He is also the "Commander" of the Tekken Force Unit.
The man known as the King of Iron Fist, a formidable figure whose incredible strength betrays his age. He is usually a callous and heartless individual, but from time to time shows a softer side. He is currently fighting his son Kazuya and his grandson Jin for control of the Mishima Zaibatsu. After discovering that both Jin and Kazuya have begun to search for Pandora, Heihachi begins his own journey with his long-time friend, Kuma, to exterminate the two in order to reclaim the Mishima Zaibatsu.
In general, Heihachi is not above betrayal, deceit, or committing small crimes in pursuit of what he perceives as a "greater good". His actions are cold-hearted and sometimes, they are inspirational (he has survived every attempt on his life thus far from pure willpower). Blood relation means nothing to him, once he believes that you are a threat, he will eliminate you without any hesitation. He is the epitome of a self-made man. He believes in complete self-reliance and in being the best in every endeavor. The only charity he will give or alliance he will accept is when it benefits himself. Occasionally, he will reward people that he deems as extraordinary, such as when he adopted Lee Chaolan after witnessing the orphan fighting, and when he took in Jin Kazama and actually came to respect his determination to destroy Ogre.
Heihachi was born as the heir to the rich, powerful, and well-respected Jinpachi Mishima, the owner of the powerful Mishima Zaibatsu and a world-famous martial arts master. During this time, Heihachi married Kazumi and eventually had a son with her named Kazuya Mishima. Kazuya grew up a frail boy, dispite Heihachi's harsh parenting. Eventually, Heihachi betrayed Jinpachi and stole the Zaibatsu from him. After assuming control, Heihachi began to steer the Zaibatsu into the military industry. Jinpachi attempted to launch a coup to retake the Zaibatsu from his son, but failed and was ultimately imprisoned underneath Hon-Maru where he remained for 40-45 years. Finally fed up with Kazuya's "weakness", Heihachi tossed his son down a deep ravine, claiming that if he were truly his son, he'd be able to survive the fall and climb back up. Kazuya actually managed to do so, but only because the Devil Gene in his blood. To further motivate Kazuya, Heihachi adopted the Chinese orphan named Lee Chaolan and he raised him as a rival to his true son. It's assumed that Heihachi didn't care about Lee at all and only used him to irritate Kazuya.
Eventually, Heihachi decided to test his son's strength so he announced the King of Iron First Tournament. Heihachi was defeated by Kazuya, who ironically tossed Heihachi off the same cliff he was dropped from. Kazuya took over the Mishima Financial Empire, and he ruled it to his heart's content; however, Heihachi managed to survives and trains himself to take back the Mishima Zabatsu.
Heihachi has been training to regain what was once his, and returns two years later as a competitor in The King of Iron Fist Tournament 2 hosted by Kazuya. He has a final showdown with Kazuya and defeats him, despite the battle being intense. Afterwards, he tosses Kazuya (who had proven to be too dangerous) into a volcano and believed he killed his son, thus regaining the Mishima Financial Empire.
Scheming to further develop the MFE, Heihachi organized "Tekken Force", the MFE's private corps, and dispatched them to settle disputes and bring wasteland under cultivation to feed the poor countries of the world, in order to gain the support of leaders worldwide. Fifteen years later, a secret excavation of Central American ruins by the Tekken Forces unearths an unusual find. They were annihilated by a mysterious being. Heihachi realized that the mysterious being could be the legendary Ogre, and took action to capture Ogre and therefore rule the world. One day, Heihachi was visited by a 15-year-old boy named Jin Kazama. Being informed that Jin was his grandson and hearing what had happened to his mother, Jun, Heihachi reasoned that Ogre thrives on the "strong souls" of others. Heihachi trained Jin to use him as a decoy to lure Ogre. When Jin turned 19, Heihachi declared to the world that the third "King of the Iron Fist Tournament" was forthcoming. He also noticed that Jin began to show the same dangerous power Kazuya had. Heihachi decided to dispose of Jin after he lures Ogre. When Jin made it to the final round, Heihachi appeared and forced him to fight in order to lure out Ogre, but kept this from Jin. He was defeated by Jin, and Ogre then appeared and was attacked by Jin. During the fight, Ogre absorbed Heihachi's power to transform into True Ogre, but was still defeated by Jin. Mere seconds after his victory, Jin is attacked by Heihachi's Tekken Force, and received multiple gunshot wounds, and Heihachi shot Jin in the head. When Heihachi turned his back and walked away, he saw the bodies of his Tekken Force before him, and turned around to see Jin morphed into his devil form, Devil Jin. Jin then slammed Heihachi through a wall of the temple and violently hurled Heihachi down into the ground, and flew off.
Heihachi failed to capture Ogre, but his researchers collected samples of it's blood and tissue. They attempted to create a new life form by combining Ogre's and Heihachi's genetic material. The experiment failed, and Heihachi learned that he lacked the Devil Gene necessary to integrate Ogre's genome into his. In order to obtain the Devil Gene, Heihachi searched for Jin, but instead learned that Kazuya's body was stored at a biotech firm called G Corporation. Heihachi ordered his Tekken Force to raid G Corporation to obtain Kazuya's remains. They obliterated G Corporation's laboratory until Kazuya, revived by G Corporation, retaliated and destroyed them. Heihachi decided to host The King of Iron Fist Tournament 4, with the Mishima Zaibatsu as the prize to lure out Jin and Kazuya. When Jin and Kazuya made it to the final round, Heihachi sent his Tekken force to abduct Jin before the final round, and held him prisoner at Honmaru. Heihachi replaced Jin in the final round, and lead Kazuya to Honmaru after the fight. Once inside the compound, Devil takes over Kazuya's mind again and tries to steal Jin's power, but is unsuccessful because of Jin's Kazama blood. Jin defeats both his father and grandfather but chooses not to kill them, and flies away. Heihachi and Kazuya were then attacked by a group of Jack robots. They began to fight off the Jacks together, but Kazuya fled and Heihachi was caught in the explosion when the Jacks detonated. The tremendous explosion would have killed a normal man but Heihachi managed to survive.
A month later, Heihachi learned that someone had taken control of the Mishima Zaibatsu and planned to hold the King of Iron Fist Tournament 5. Heihachi, having fully recovered, was determined to enter the tournament. Heihachi accuses Kazuya of sending the Jack-4s to kill him, but Kazuya denies it, and Heihachi realizes that the real sponsor of the tounament was his father, Jinpachi Mishima. After being assaulted by the Jack force, Heihachi wakes up only to find out that the King of Iron Fist Tournament 5 has already ended.
He goes back to Zaibatsu headquarters only to find the Tekken Force blocking his way. After the next Iron Fist Tournament is announced and Heihachi finds out that Jin Kazama is the new head of the Mishima Zaibatsu, he is enraged and declares that he will get everything back. Heihachi comandeered a Tekken Force helicopter, and attacks Jin shortly after Jin's battle with Azazel, but is defeated.
- If Heihachi defeats Akuma, he will be surprised that his power can rival the Devil Gene.