Given the nature of the series, the characters have been split into multiple sections.
Also, be prepared for SPOILERS concerning the characters in the games.
Tekken 1note Kazuya Mishima, Paul Phoenix, King, Marshall Law, Nina Williams, Yoshimitsu, Michelle Chang, the Jack series, Lee Chaolan, Kuma I, Armor King, Wang Jinrei, Anna Williams, Ganryu, Kunimitsu, Heihachi Mishima, Devil/Angel
Tekken 2note Jun Kazama, Lei Wulong, Baek Doo San, Bruce Irvin, the Roger family
Tekken 3note Jin Kazama, Hwoarang, Ling Xiaoyu, King II, Forest Law, Eddy Gordo, Kuma II, Panda, Julia Chang, Bryan Fury, Tiger Jackson, Mokujin, Ogre, Dr. Bosconovitch, Gon