Height: 168cm Weight: 76kg Age: 18 The reigning champion of the Underground Arena, where martial artists from all over the world gather. He trains relentlessly every day to surpass his father, Yujiro Hanma, who is known as the Strongest Creature on Earth. He has a muscular body covered in countless scars from years of actual combat and insane training since childhood. Despite his extraordinary power, he is fundamentally a sensible and grounded person.

Height: 190cm Weight: 120kg Age: 38 The Strongest Creature on Earth. The father of Baki Hanma and Jack Hammer. He has a demonic appearance with wild hair like a lion's mane swept back. His combat ability exceeds even the military power of a nation. He has an arrogant personality. While he enjoys absolute power, he also has sides such as respecting great men who become the hope of the weak and frequenting high-end restaurants.

Height: 243cm Weight: 211kg Age: 21 Baki Hanma's half-brother. A man who aims to be the strongest through extreme doping, bone-lengthening surgery, and training. He has mastered attacks involving biting. He possesses a terrifying obsession with strength and extreme stoicism. While his fighting style is abnormal, he is usually a man of few words and knows his manners.

Height: 178cm Weight: 110kg Age: 55 The Grandmaster of Shinshinkai Karate, the world's largest karate organization. Known as the "Tiger Killer," his strength is considered a living legend. He never slacks on his training and is still active. He has a traditional Tokyoite (Edokko) spirit and occasionally shows a humorous side. He has an adopted son, Katsumi Orochi.

Height: 186cm Weight: 116kg Age: 21 A master instructor of Shinshinkai and the adopted son of Doppo Orochi. He possesses genius-level athletic reflexes. He developed the "Mach Punch," a fist that exceeds the speed of sound. Called the "Ultimate Weapon of Karate," he serves as the second director of Shinshinkai. He has grown significantly as a martial artist who carries the banner of karate and fights with the feelings of his comrades in his heart.

Height: 176cm Weight: 106kg Age: 30 "Kaioh" is a title given to masters of Kenpo, and Retsu Kaioh is an exceptionally outstanding martial artist even among them. He has absolute faith in the 4,000-year history of Chinese Kenpo and its achievements. He shows no mercy to those who insult it. His basic personality is kind.

Height: 191cm Weight: 166kg Age: 20 Japan's number one brawler who boasts superhuman grip strength and lives by the motto of bare-knuckle fighting (stegoro). He does not practice martial arts or train. Both of his parents are deceased. He is taciturn and rarely shows emotion. Due to his title as a Yakuza boss and his appearance, he can seem intimidating, but he has a kind and caring personality.