Yujiro Hanma, known as "The Ogre" and "The Strongest Creature on Earth," hails from Japan. The son of Yuuichirou Hanma, he is approximately 37 years old, standing 190 cm tall and weighing around 120 kg. His striking appearance features red hair, thick black eyebrows, and an extraordinarily muscular physique. When flexed, his back muscles form a distinct demonic face, the origin of his "Ogre" title and a symbol of his supreme power. At 16, Yujiro fought in the Vietnam War, where he single-handedly defeated U.S. military units. There, he assaulted Diane Neil, resulting in the birth of his son, Jack Hanma. Returning to Japan, he briefly partnered with Emi Akezawa, fathering his other son, Baki Hanma, before abandoning the family, leaving Emi to raise Baki alone. Professionally, Yujiro operates as a high-priced mercenary and assassin for governments and organizations, commanding exorbitant fees that fund his lavish lifestyle. He enjoys complete impunity under a contractual agreement with the U.S. government, renewed annually by the president. His personality is marked by arrogance, violence, and emotional manipulation. He considers mercy a weakness and kills opponents without remorse when angered or for pleasure. This sadism was demonstrated when he killed Emi Akezawa during a fight with Baki by rupturing her eardrums and breaking her spine. Despite this brutality, he occasionally displays nuanced behavior, such as offering Baki soup as a sign of respect or expressing regret over Emi's death. He actively pushes Baki to become stronger, driven by a desire for a worthy opponent and a distorted sense of paternal legacy. Yujiro's combat abilities are unparalleled. He possesses superhuman strength capable of stopping earthquakes with a punch, crushing coal into dust, and defeating elephants with single blows. His speed exceeds visual tracking, and his durability makes him nearly impervious to injury. He masters every known martial art and employs the "Demon Face" technique to enhance his physical prowess, adhering to a fighting philosophy centered on brute strength and rejecting weapons in favor of his body. His relationship with Baki is adversarial yet complex. Yujiro orchestrates brutal challenges to force Baki's growth, including encouraging his relationship with Kozue Matsumoto to trigger maturation. Despite their conflicts, Yujiro acknowledges Baki's potential and occasionally shows subtle respect. Gerry Strydum, often called "Captain Strydum," is a U.S. Army general in his 50s, standing approximately 195 cm tall. He first encountered Yujiro during the Vietnam War when Yujiro attacked his unit. Strydum attempted a handshake in admiration but was nearly killed when Yujiro used him as a human shield during gunfire; Strydum survived due to a bulletproof vest, sustaining broken ribs. This incident forged a complicated allegiance, leading Strydum to accompany Yujiro as a comrade in global conflicts, though he frequently disapproves of Yujiro's brutality. Strydum also mentors Baki, providing updates on Yujiro's whereabouts and aiding his training. He arranged Baki's combat experience with mercenaries in Hokkaido and later organized the duel between Baki and Yujiro at a U.S. military base in Japan. During the fight, he expressed regret over Emi's death and showed consistent concern for Baki's well-being. Strydum demonstrates notable courage, confronting Hector Doyle over underhanded tactics and pacifying the prehistoric warrior Pickle by approaching him naked to signal non-aggression. His military expertise includes hand-to-hand combat and tactical oversight, though his decisions sometimes lack prudence, as seen when he challenged Yujiro while wearing mechanical armor and failed. Through their interactions, Yujiro transitions from a battlefield-focused youth to a calculated force in modern society, while Strydum balances his military duties with mediating the Hanma family conflict.