Devil Jin (デビル仁 Debiru Jin?) is a Tekken character who made his first appearance in Tekken 3, but didn't become a fully playable character until Tekken 5. He is Jin Kazama's devil form after being consumed by the effects of the Devil Gene. When the Devil Gene completely takes over Jin's mind, he becomes crazed, arrogant, witty, seemingly cannibalistic (as shown in his scenario campaign dialogues), aggressive, destructive and brooding.

He seeks to achieve ultimate power, and will do whatever it takes to achieve it. He is also very confrontational & sadistic, as he has a habit of laughing at the suffering of his foes during his win animations. He refers to his opponents as "Prey" & relishes the fear of those who encounter him. He does not seem to recognize his human form's friends or associates (as shown in his scenario campaign dialogues where he does not recognize Heihachi, Xiaoyu, Asuka, or Eddy).

When Jin manages to get his Devil Gene under control, as shown in the non-canon Tekken: Blood Vengeance, Devil Jin retains his human form's sanity. The only people that seem to be able to bring Jin back to his human senses, are: his mother Jun or his relative, Asuka Kazama (even though she's unaware) as the Kazama family can neutralize the devil gene. After he defeated Azazel, Jin Kazama was apprehended by UN troops.

As his unconscious body was being transported by helicopter, he became possessed by his devil form, ripped free from his straitjacket, tore through the helicopter's fuselage with a powerful beam attack, and then escaped. Intermittently fending off the UN's attempts to recapture him, Devil Jin wandered the desert until he stumbled across a town in the Middle East. His arrival at the town's bazaar sent the civilians fleeing for their lives, turning the once buzzing settlement into an abandoned husk.

That is until a certain someone showed his face... Ending Description: After defeating Hwoarang, Devil Jin smirks as his opponent gets back up to fight again. But their battle is interrupted by Arabian soldiers who toss a grenade at them. Hwoarang kicks Devil Jin away and is hit by the explosion. Afterwards, Devil Jin flies into the air and unleashes a beam attack on the soldiers. While Jin is unconscious, the UN takes him from the desert.

But his devil powers has gone awry again and destroys the helicopter carrying him. Later, Jin walks through the desert beneath the sandstorms and is cornered by the Arabian soldiers. His powers go berserk second time, causing him to unleash a laser beam into the sky. After Heihachi's death, at the same time Lee confirms that G Corporation will not do anything to stop the endless apocalyptic war, an awakened Jin accepts that he is now the only one who can stop Kazuya because of the devil's blood that runs through his veins. Vowing to kill his father, Jin awakens his devil's power.