Height: 186.5 cm Weight: 116 kg Age: 21 The adopted son of Doppo Orochi, the founder of Shinshinkai. The second-generation Grandmaster of Shinshinkai. A man possessed of extraordinary physical ability and talent, hailed as the "Ultimate Weapon" of the karate world. As a second-generation "rich kid" blessed with natural talent, he was once arrogant. However, through experiencing defeat and receiving words from the truly strong, he has grown significantly in both spirit and technique. He is now a reliable young leader. Doppo has evaluated him as being stronger than himself. He developed the "Mach Punch," which reaches the speed of sound instantaneously. Its power is immense.

178 cm 110 kg 55 years old The Grandmaster of Shinshinkai Karate, which boasts one million students nationwide. His strength is so great that he is hailed as a living legend, commanding respect from many martial artists beyond just karateka. He has a quintessential old-school Tokyo (Edokko) temperament—surprisingly playful, mischievous, and humorous—and is deeply revered by his many disciples. He holds numerous nicknames such as "Tiger Slayer," "God of War," and "Man-Eating Orochi."

Height: 180 cm Weight: 75 kg 25 years old A hyper-practical fighter who prefers training through street brawls rather than dojo practice. He favors dangerous techniques like eye-gouging and strikes to vital points. Disgusted by karate bound by forms and rules, he left Shinshinkai and spent three years as a yakuza bodyguard. During that time, he mastered "Brawl Karate" honed against handguns and katanas. He later returned to Shinshinkai at Doppo Orochi's invitation. Known by the nickname "Dangerous Lion." By his own account, he is the one who admires Doppo the most.

Height: 205 cm Weight: 130 kg 25 years old Fierce-tempered with a terrifying face. The Japanese champion of full-contact karate. He utilizes outstanding physical ability combined with karate techniques cultivated at Shinshinkai. Beyond his physical strength, he is a sharp-witted tactician. He takes karate very seriously. He has a personality that deeply cares for his comrades and master. He is in the same year as Kiyosumi Kato and they often hang out together.