Kazuya's characterization is defined by how much he hates his old man for this. And killed his beloved mother, Kazumi, as well. Abusive Parents: He's been on both ends of this.Kazuya intends to eliminate them too as the world erupts into a chaotic war, to ensure that he is the one and only member of the Mishima clan remaining to rule the world. Now, the only true threats that stand between him and the complete domination of the world are his last remaining family members: Jin Kazama and Lars Alexandersson, who has teamed up under a new resistance group called Yggdrasil. Even the world's leading powers who try to resist prove to be no match for him, as he effortlessly appears before them and seizes control over their safe haven in New York. He proceeded to utterly destroy the Mishima Zaibatsu using his G Corporation armies rather than merging their resources together in order to completely erase what his father built up, and went on to further spread destruction across the globe, bringing entire cities under his iron fisted rule (no puns intended).
With no one left to stand in his way, he could finally begin his own ambitions of world conquest. Unfortunately, Kazuya wasn't satisfied with just destroying everything his father had built.