The protagonist of the series has varied between installments; the character ending of each canon game determines the protagonist of each. Kazuya Mishima was the protagonist in the original game, his father Heihachi Mishima was the protagonist of "Tekken 2" and "Tekken 7", and Jin Kazama has been the central protagonist since his debut in "Tekken 3". The conflict between the Mishima family within multiple generations serves as the main conflict to the series' plot according to Katsuhiro Harada who describes it as a simple struggle. Although Lars Alexandersson among other characters are not fully related to them, they serve as major characters within "Tekken 6" where Jin serves as the main antagonist instead of his relatives.