How do you turn Kazuya into devil?

In the "Tekken" series, Kazuya Mishima transforms into his Devil form through a combination of his intense anger and the influence of the Devil Gene, which he inherited from his father, Heihachi Mishima. This transformation can be triggered during specific story moments or through gameplay mechanics, typically when Kazuya's health is low or when certain conditions are met in battle. In some games, players can also activate this transformation by selecting a special move or inputting a specific command.