Devil

Devil (デビル Debiru), also referred to as Devil Kazuya (デビル一八 Debiru Kazuya) is Kazuya Mishima after the Devil Gene takes over him. He was first introduced in Tekken as a secret costume for Kazuya and makes his debut as a playable character complete with his own move-set inTekken 2 and served as the final boss. Devil split from Kazuya after he was nearly killed at the end of The King of Iron Fist Tournament 2. InTekken 7, it is revealed that Kazuya inherited the Devil Gene from his mother Kazumi Mishima at birth. A scene in the opening of Tekken 3, portraying a ghostly figure branding the arm of Jin with a mysterious tattoo that leads many fans to theorize that Devil would later possess the body of Jin, after the disappearance of his mother, Jun Kazama who had protected her unborn child from it 15 years ago. However, Jin inherited the Devil Gene from his father at birth.

In recent games, specifically Tekken Tag Tournament 2, Kazuya and Devil are treated as one and the same in terms of gameplay. Devil will be making a non-canon appearance in Tekken Tag Tournament 2 but under the name of Kazuya, as a special stance that allows Kazuya to transform into his Devil form, allowing him to use his Devil abilities to fly and projectile a laser from his forehead. For references after his final in name appearance, please see Kazuya from Tekken 4 onward.