The Jack series is the Mishima Zaibatsu's weapon line — combat robots built for the specific purpose of force multiplication, each iteration more capable than the last. The protocol is the character's complete description: not motivation, not history, not psychology. A sequence of directives that constitutes the entirety of what Jack-7 is. The series uses the Jacks as both antagonists and occasional tools, the machine logic a counterpoint to the very human mess of the Mishima conflict surrounding them.