Baki RPG.

Name: Tokyo Dome Underground Arena.
Who organizes it: Mitsunari Tokugawa, an elderly millionaire and passionate about martial arts.
What happens there: Fights take place between fighters of different styles. The fights can be extremely brutal, and the participants have considerable freedom in how they fight.
Main fighter: Baki Hanma becomes one of the most important champions in the arena.
Tokugawa: In addition to organizing the fights, he observes and studies the fighters and has connections with many masters and warriors.

The main characters, summarized
Baki → protagonist, champion of the underground arena.
Yujiro → Baki's father and his ultimate goal.
Jack → Baki's older brother.
Hanayama → gigantic teenager with brutal strength.
Doppo → karate master.
Katsumi → karate prodigy.
Retsu → Chinese kung fu master.
Shibukawa → old Aiki master.
Oliva → monster of physical strength.
Kaku → legendary old master.
Gaia → military specialist.
Motobe → strategist and master of jūjutsu.
Kozue → an important person in Baki's life.
Tokugawa → organizer of the underground arena.

The five condemned to death
One of Baki's most famous arcs brings together five extremely dangerous criminals:
Character
Feature
Spec
Extraordinary physical strength and lung capacity
Dorian
Great strength and unconventional techniques
Doyle
Calculating fighter
Sikorsky
Grip strength and climbing
Yanagi
Poison Palm Techniques

MITSUNARI TOKUGAWA
Name: Mitsunari Tokugawa
Age: elderly.
Appearance:
A small, elderly Japanese man with white hair and elegant clothing. Although physically not a fighter, he wields enormous influence.
He is the owner and organizer of the underground arena, where some of the best fighters meet.
He also has enough money and power to organize completely out-of-the-ordinary events.

KOZUE MATSUMOTO
Name: Kozue Matsumoto
Age: teenager.
Appearance:
A young Japanese woman with brown hair, usually long, large eyes, and a delicate appearance. Her design contrasts sharply with the muscular fighters who surround her.
She is Baki's partner and one of the most emotionally important people to him.
The official website describes her as the woman most loved by Baki.
Baki Anime

IZOU MOTOBE
Name: Izou Motobe
Age: senior citizen.
Appearance:
A middle-aged man, muscular but not gigantic, with dark hair and a beard.
He is a master of jūjutsu and possesses knowledge of many forms of combat.
Unlike other characters, Motobe places a great deal of emphasis on strategy and preparation.

GAIA
Name: Gaia
Age: young adult.
Appearance:
He has long, dark hair, an athletic build, and a rather laid-back demeanor. He doesn't appear as gigantic as some other fighters, but his true danger lies in his skills.
He is a military specialist and possesses techniques related to combat, terrain, and psychological warfare.

YANAGI RYUKO
Name: Ryuko Yanagi
Age: adult.
Appearance:
Tall, thin man with dark hair and a sharp face.
He specializes in unconventional techniques and uses a technique known as "the poison palm".
He is one of the five condemned to death.
Baki Anime

SIKORSKY
Name: Sikorsky
Age: adult.
Appearance:
A very tall, muscular man with dark hair. He has exceptionally strong arms and hands and uses his physical strength to climb surfaces and grip virtually impossible places.
He is another of the five convicted.

DORIAN
Name: Dorian
Age: adult.
Appearance:
A huge, muscular man with dark skin and light hair. He has an imposing appearance and often smiles even in dangerous situations.
He is one of the five condemned to death.

SPECK
Name: Spec / Spec
Age: senior citizen.
Appearance:
He's enormous, very muscular, and looks quite aged. His hair is gray, and his body is covered in muscle.
Its most extraordinary characteristic is its lung capacity: it can perform physical activity for several minutes without breathing. The official website specifically highlights this ability.

DOYLE
Name: Doyle
Age: adult.
Appearance:
A tall, muscular man with light hair and a rather refined appearance. He is one of the five death row inmates who appear in Baki.
Personality: calculating, dangerous, and quite unpredictable.

KAKU KAIOH
Name: Kaku Kaioh
Age: over 100 years.
Appearance:
He is an extremely small and thin old man. At first glance he appears frail, but he is one of the most dangerous martial arts masters in history.
He has white hair, a beard, and a very aged appearance.
Specialty: Chinese kung fu.
His philosophy consists of using technique and body efficiency instead of relying solely on strength.
He appears among the grandmasters of the Chinese tournament.

MOHAMMED ALI JR.
Name: Muhammad Ali Jr.
Age: around 20 years old.
Appearance:
A tall, athletic young man with dark skin and short black hair. His physique is primarily developed for speed, mobility, and boxing.
He is the son of the famous fictional boxer based on Muhammad Ali.
Personality: charismatic, proud, and quite confident in his abilities.

OLIVE BISCUIT
Name: Olive Biscuit
Nickname: “Mr. Unchained” / “The Freest Man”.
Age: around 40 years old.
Appearance:
Gigantic. He has an extremely muscular body, especially his chest, back, arms, and abdomen. His hair is dark and short, and he usually wears sunglasses.
His physique is so exaggerated that he looks like a gym statue come to life. 💀
He is one of the physically most powerful characters in the series.
The official website presents him as "the freest man on Earth".

RETSU KAIOH
Name: Retsu Kaioh
Age: around 30 years old.
Appearance:
Tall, muscular Chinese man with long black hair. He usually wears traditional Chinese martial arts clothing.
He is one of the great masters of Chinese kung fu and possesses a huge variety of techniques.
The official website identifies him as one of the top fighters in the underground arena.
Baki Anime
Personality: disciplined, proud of his martial art and very respectful of strong opponents.

GOKI SHIBUKAWA
Name: Goki Shibukawa
Age: around 70 years old.
Appearance:
A small, seemingly frail old man with gray/white hair and a beard. That appearance is quite deceiving: he is an extraordinary Aiki master.
His technique uses the opponent's movement and strength against him.
Personality: cheerful, joking and quite relaxed, but becomes extremely serious when he fights.

KAORU HANAYAMA
Name: Kaoru Hanayama
Age: 15 years old, at an important stage in history.
Baki Anime
Appearance:
Here Baki gets especially absurd 😂. Hanayama is a teenager who looks like a gigantic adult. He has a huge, extremely muscular body, short black hair, thick eyebrows, and a massive scar across his face.
Its most famous feature is its extraordinary gripping strength.
He is the head of the Hanayama family and is famous for being one of the strongest street fighters in Japan.

KATSUMI OROCHI
Name: Katsumi Orochi
Age: approximately 20 years.
Appearance:
A tall, muscular young man with dark hair. He has a much more streamlined appearance than Doppo. His body is trained to develop extraordinary speed and power.
He is Doppo's adopted son and one of the main representatives of Shinshinkai karate.
Personality: Initially arrogant, but matures as he faces stronger rivals.

DOPPO OROCHI
Name: Doppo Orochi
Age: around 50 years old.
Appearance:
A middle-aged man, short but very muscular. He has a nearly shaved head, a beard and mustache, thick eyebrows, and a very serious expression. His arms and hands are particularly well-developed.
He is a legendary karate master, founder of the Shinshinkai school.
Personality: disciplined, serious and proud, although he also deeply respects good fighters.
The official website lists him among the top warriors of the underground arena.

JACK HANMA
Name: Jack Hanma / Jack Hammer
Age: approximately 20-something, depending on the stage of the story.
Appearance:
Jack is much taller than Baki. He has long blond hair, an extremely muscular body, and an almost skeletal appearance at times due to his training methods. His arms and legs are very long, and he has a very pronounced jawline.
He is Baki's older half-brother.
Baki Anime
Personality: obsessive, aggressive, and extremely determined.
Objective: to surpass his own limits and prove that he can reach Yujiro's level.

YUJIRO HANMA
Name: Yujiro Hanma (範馬勇次郎)
Age: around 40 years old.
Nickname: “The strongest creature on Earth.”
Appearance:
He is a gigantic man, extremely muscular and broad-shouldered. He has dark red hair, usually long enough to reach about the nape of his neck, thick eyebrows, and an intimidating gaze. His body is covered in enormous musculature, especially his shoulders, back, and arms.
A famous feature is the shape of its back, where the so-called "demonic face" appears, a visual manifestation associated with the strength of the Hanma.
Personality: arrogant, brutal, extremely self-confident and obsessed with strength.
Personality: arrogant, brutal, extremely self-confident and obsessed with strength.
Relationship: He is the father of Baki and Jack. His enormous influence on the story stems from Baki's desire to become strong enough to confront him.

BAKI HANMA
Name: Baki Hanma (範馬刃牙)
Age: 17 years old for most of Baki; turns 18 in Baki Hanma.
Height: around 1.67 m in early stages, although the proportions change quite a bit depending on the stage.
The Escapist
Appearance:
Baki has short, dark brown, slightly messy hair. He is relatively short compared to many of his rivals, but possesses an extremely muscular and defined physique. His face usually appears youthful, although during fights it takes on a much more serious and aggressive expression. Through training, he develops very pronounced musculature, especially in his arms, back, abdomen, and legs.
Personality: He is competitive, determined, and fairly calm outside of combat. Unlike Yujiro, Baki tries to maintain a sense of honor and doesn't simply seek to destroy his opponents.
His goal: to surpass his father, Yujiro Hanma. The official website presents him as the champion of the underground arena and notes that he finally gets Yujiro to acknowledge his strength.