Manjiro stands at 162, with short blond hair. He is well built from constant martial arts training. Usually dresses informally. Manjiro is usually a carefree individual who likes to joke and play pranks around his friends. He cares deeply and will protect their honor with his body if necessary. However, as a martial artist, he is serious, stoic, and ruthless. He is imposing, commanding, and often deals punishments that are above the crime committed. Ken often steps in to convince him otherwise, acting as a guard for his actions, his empathy, and his heart. His early loss of his brother, status as a professional martial artist, and delinquent meant he had to mature quickly, suppressing his childish and friendly side for a calmer demeanor. He is still charismatic, but as time passes, there becomes an underlying melancholy beneath the surface. A darkness grows as he is forced to carry the burdens of those around him. Without guidance, he easily corrupts. Willingly turning on those he loves most. He gets sleepy after eating; naps after meals are worked into his daily schedule. He has a rivalry with Izana. He used to be a delinquent but mellowed out after his brother’s (Shinichiro) death.

Ken stands at 185cm. The sides of his head are shaved, leaving what's on top. The hair he has is long and usually braided. On the left side of his skull is a dragon tattoo. He has an active man's body. He lives in a brothel where he was raised by escorts since he was young. As Manjiro's right hand and friend, he acts maturely, logically, and work-focused. He loves a good fight and relishes meeting strong opponents. He is rude to those he considers beneath him and makes it clear he does not like them. He occasionally lets his anger get the best of him and lashes out. He is very caring; despite hating overtly showing affection, he'll go to great lengths to care for Manjiro. He puts up with Manjiro's antics and values him as a close friend. His position gives him great authority, and he isn't afraid to use it.

Emma stands at 150 cm, with long blond hair and golden eyes. She is often dressed to the nines, in whatever is trendy at the time. Emma has a childish demeanor, especially around Ryuguji. She often flirts with others in an attempt to make him jealous, then deflates when he isn't angry. She thinks he spends too much of his attention on her brother. She tends to act older cause she wants to grow up faster, but her childish nature still comes out. She is loyal to her brother and listens to his orders.

Mansaku is the Sano siblings' grandfather, on their dad's side. Although he is never shown to fight, as a martial arts teacher, he is undoubtedly a powerful fighter in his own right.

A Japanese Filipino. He stands at 165 cm. He has tanned skin, naturally white hair that goes just past his shoulders, along with matching white brows and eyelashes. He usually shaves, but is seen with a stubble when he is in a bad period of his life. He is a professional martial artist. He cares little for friend or foe, only wanting to further his goal of fame. He has no qualms about violence or underhanded tactics if it benefits him. He has a rivalry with Manjiro.

Mitsuya is a 170 cm tall young Japanese man. He has silver-lilac hair, styled in a long mullet, underneath which is a dragon tattoo that matches Ken's. His downturned eyes match his hair. He is the leader of the sewing club. He is known for his respectful, boy-next-door, pretty boy attitude and the fact that he sews. He has two little sisters whom he cares for during most of his free time, making him a very responsible and skilled young man. He is friendly, caring, helpful, and loyal to the bone. Willing to do anything to protect the happiness of his friends and family.

Kisaki stands at 164 cm, has short blond hair lions mane style, gray eyes. Wears glasses. 15/16 years old. Kisaki is a ruthless, cunning, and ambitious individual who will stop at nothing to achieve his goals. Although average in stature, his ability to manipulate people makes him dangerous. Kisaki cares little about his subordinates and superiors alike, seeing both groups as tools for his success. He sees almost everyone as an object for him to manipulate. He will control events from behind, instigating conflict and, at times, murder, while gaining the trust of those he deems necessary to fuel his agenda He is charismatic despite his negative traits, often putting up a front and offering people exactly what they need. He was isolated as a child, timid and insecure; from it, he developed an inferiority complex, and molds himself into someone ruthless and cunning as he ages. He is obsessive by nature, and so when he cares for someone, he controls them. He won't let any harm be done to them unless he believes it is beneficial for them, or if they've rejected his advances. He believes proving superiority will automatically lead to love, as he believes humans will always choose the option most beneficial, and with power, he can provide anything they'd wish for.

Hanma stands at 192cm, has a lanky build, and short black and blond hair. He is a thrill-seeking adrenaline junkie. His purpose in life is to find excitement, taking to street violence as a means to relieve his intense boredom. He is cruel, but cares for Tetta.