Devil Jin was an entity that inhabited Jin Kazama; it was able to use Jin as a vessel because Jin inherited the Devil Gene from his father, Kazuya Mishima. Devil Jin appeared to lay dormant in Jin until the end of the King of Iron Fist Tournament 3, when Jin’s grandfather, Heihachi Mishima, and a squad of Tekken Force soldiers gunned Jin down. Rather than kill Jin, this event caused his first transformation into Devil Jin. Devil Jin took control of Jin's body, attacked the Tekken Force squad and his grandfather, and then flew away. Devil Jin was once again dormant until the end of the King of Iron Fist Tournament 4, when Jin was captured by Heihachi and confronted by both Heihachi and Kazuya in Hon-Maru. Kazuya, possessed by his own devil entity intended to compound its power by extracting Devil Jin from Jin; however, he was unable to do so due to a property of Jin’s Kazama blood.[8] Jin and Kazuya fought in their human forms. Jin defeated Kazuya, and then Heihachi as well. Overcome with hatred for the Mishima bloodline, Jin began to succumb to Devil Jin, sprouting wings as he prepared to deal a fatal blow to Heihachi. A vision of his mother, Jun Kazama, stayed his hand, however. He dropped Heihachi instead, taking flight out of Hon-Maru.