After defeating the monster, Jin passes out, and his devil mark fades away. His search leads him to Azazel, an ancient immortal demon with immense power who could be the source of Devil Gene. While Devil Gene proceeds to take more control over his body, Jin seeks to rid himself of this curse. He defeats Kazuya and Heihachi in battles that follow and begins his total transformation into Devil Jin before his mother's spirit helps him regain some sense. Before this can happen, Jin awakens, and with the help of Devil Gene's powers, breaks free of restraints. Heihachi uses this opportunity to capture Jin while his father Kazuya, overtaken by his own Devil Gene, attempts to awaken and extract the second half of the Devil out of Jin. Sometime later, Jin regains control and competes in the fourth King of Iron Fist tournament.

After healing the injury, Devil Jin defeated Heihachi and Tekken Force soldiers before flying off.

The Devil awakened during the third King of Iron Fist tournament when Heihachi shot his grandson in the head. When Ogre presumedly killed her, Devil took this opportunity and possessed Jin, branding him with Devil's mark. He inherited it from his father, Kazuya Mishima, but his mother, Jun Kazama, warded off the Devil, who was going after Jin for the longest time. Devil Jin is a result of the Devil Gene taking over Jin's body and mind.

Tekken 5 devil jin logo