In Tekken 3, he acted as the protagonist, became an orphan, got acquainted with his grandfather Heiachi and got trained by him, won the King of the Iron Fist Tournament, and defeated Ogre, avenging the death of his mother and ending up manifesting his hidden and dark side. Jin took on several roles throughout the series:

His fighting style initially inherits the best of the Mishima style signature moves, namely the Wind God Fist and the Dragon Uppercut, and after a life-changing event occurred at the end of Tekken 3, he decided to embrace the path based on the kyokunshinkai, the martial arts that he learned from Jun Kazama, his mother. He cheated death by manifesting the power of the Devil Gene and turning into a demonic form, Devil Jin, boasting incredible powers, a pair of dark wings, two horns, and the ability to cast a deadly laser through the third eye that is on his forehead. Lured by his grandfather Heiachi Mishima into taking part in the tournament and defeating Ancient Ogre, the great evil, and True Ogre, his ultimate form as well, Jin got betrayed by Heiachi and eliminated by him and the Tekken Force right after defeating the monstrous menace. Despite Jun's efforts, Jin still inherited the Devil Gene and ultimately became a potential threat to the world at the end of the King of Iron Fist Tournament 3. Jun managed to keep Kazuya safe from the Devil's complete grasp for a while and limited the influence that the entity, which is part of the Mishima's Bloodline, could have on his son Jin. Given that Jin and his alternate form are still alive and well in Tekken 7, the Devil is sure to collect his due again whenever a sequel arrives.Jin is the son of Kazuya Mishima, the main character of the first installment of the Tekken franchise, and Jun Kazama, his mother, who got pregnant during the events told in Tekken 2. It's this moral ambiguity and depth that makes Jin such a conflicted hero, and Devil Jin such a fearsome villain and bogeyman for the series. By fighting the demon in a battle to the death, he would both rid the world of it, as well as save it from the terror of the Devil Gene. This was a suicide mission, as he hoped to awaken the monstrous Azazel. He would even wage war with the entire world in Tekken 6. Devil Jin's arcade ending even has him absorbing Jinpachi's powers! Jin would still wrestle with his alter ego, wanting nothing to do with its or his evil bloodline. Jin would defeat his grandfather Jinpachi in Tekken 5, becoming the new chairman of the Mishima Zaibatsu. Devil Jin would almost kill Heihachi in Tekken 4, if not for the calming influence of his mother's memory. Jin himself grew to hate Devil Jin, seeing it as the manifestation of his accursed Mishima heritage.

History of devil jin in tekken 5