Devil Kazuya (デビルカズヤ Debiru Kazuya?), formerly simply known as Devil (デビル Debiru?), is one of the main antagonists of the Tekken series who made its debut in the console version of Tekken in the form of an unlockable third costume for Kazuya Mishima. Its playable debut as a standalone character came later in Tekken 2, where it acts as the final boss for all characters except itself. It is the devil counterpart of Kazuya, and later his son, Jin Kazama, after it was split in two when Kazuya was cast into a volcano at the end of Tekken 2. Originally a malevolent entity intent on possessing either Kazuya or Jin, one half has now merged with Kazuya, and is under Kazuya's control. Since Tekken Tag Tournament 2 but excluding Tekken (Mobile), Devil Kazuya is an in-battle transformation for Kazuya. Though multiple characters have a 'devil', only the iteration within Kazuya has been historically referred to as 'Devil'. Devil can take its own form or can take over the body of Kazuya or Jin to become Devil Kazuya or Devil Jin respectively. Devil Kazuya is the final boss of Tekken 2's Arcade Mode, Tekken 7's Story Mode, and the default final boss in Tekken 8's Arcade Mode, with his True Devil appearance taking that spot if the player achieves two Perfect rounds.