Jack Hanma is one of the most physically imposing fighters in the Baki franchise. Standing well over 8 feet tall after numerous extreme surgeries and relentless training, Jack is a towering mass of muscle, scars, and raw aggression. His gaunt face, sunken eyes, and constantly clenched jaw give him a predatory appearance. Unlike many martial artists who pursue technique or philosophy, Jack is driven by an obsessive desire for strength and by his hatred of his father, Yujiro Hanma. He willingly sacrifices his health, taking performance-enhancing drugs and pushing his body beyond its natural limits in pursuit of power. Jack's signature fighting style is known as the "Way of the Bite" (Goudou). After realizing that conventional martial arts had limits, he transformed biting into a complete combat system. Rather than using bites as a desperate tactic, Jack treats his jaws like weapons. He surgically enhanced his teeth and jaw strength, allowing him to tear into opponents with devastating force. In battle, he targets muscles, tendons, nerves, and even bone, ripping away flesh and weakening opponents piece by piece. Goudou combines Jack's immense physical strength with savage, animalistic precision, making every grab, tackle, and clinch an opportunity for a crippling bite. To Jack, the bite is the purest expression of combat: direct, brutal, and impossible to ignore. It reflects his personality perfectly—relentless, uncompromising, and willing to sacrifice anything for victory.