Chor Au-Kuen Chor Au-Kuen (, meaning "left-hooked fist"), portrayed by
Ruco Chan, is the main protagonist. He is often referred to as Kuen Lo (拳佬; "Fist Guy"; alt. "Boxer") by his friends, and is an extremely gifted martial arts novice. Kuen is described as an "optimistic and hot-blooded" natural-born leader, but is flawed with his impulsive and competitive nature. Kuen is kind-hearted, sometimes to the point of naivety. Yeung Hoi-pok portrayed 10-year-old Kuen. Kuen was born
Chiu Yeung (朝陽;
Ziu1 Joeng4), and was the son of Chiu Mang-san, a
Bajiquan master of the Chiu style. He and his younger sister Chiu Ha were both diligent Bajiquan students of their father. In 1945, when Yeung was 10, his family moved into the
Kowloon Walled City to start a new living. They get acquainted with Duen Tung-tin, a Bajiquan master of the Duen style. Master Duen had long been a protector of the walled city; his Bajiquan kwoon was established to defend the walled city against oncoming
triads, who were trying to take the ungoverned walled city as their base. Wanting to protect the walled city with them, Yeung asked his father to teach him his signature move, "Scaling Tiger" (猛虎硬爬山), but his father said the move was too powerful for someone as young as Yeung to learn. Yeung was forcibly separated from his family when Master Duen died under mysterious circumstances. Duen's students claimed that Yeung's father was the murderer, as they were seen fighting right before Duen's death. The doctor ruled the cause of the death to be
blunt trauma, and only Chiu's "Fierce Tiger Climbing Mountain" strike had enough power to kill. Yeung's parents were then beaten to death by Duen's students, and Yeung was separated from his younger sister. Yeung then escaped to
Macau to live with his great-aunt. In 1959, 26-year-old Yeung, now named Chor Au-kuen, returns to the Kowloon Walled City to search for his sister. He meets
But Tak-liu, a general contractor, who brings him into the walled city and introduces him to a water labouring job so he can pay his rent to the landlady
Tiu Lan. By chance, he meets
Duen Ying-fung, Master Duen's now adult son, and learns that the Duen family no longer operate a Bajiquan kwoon due to increasing intimidation of the Fellow Association, the walled city's largest triad organisation. Master Duen's death had indirectly led to the rise of the Fellow Association's power in the walled city. Kuen feels regretful and responsible—if his father had not killed Duen, the walled city may not have fallen victim into the wrong hands. He also learns from Fung that his sister had died from a mountain fire 15 years ago while attempting to escape the walled city. Kuen develops
survivor's guilt as a result. Wanting to atone his sins, Kuen decides to stay in the walled city and takes on the duty of protecting its people. Believing that his father's "Fierce Tiger Climbing Mountain" to be the strike that had killed Master Duen, Kuen refuses to re-learn Bajiquan, and seeks help from his neighbour
Thai Por, a retired master in
Wing Chun and
Muay Thai. Kuen is a quick learner, and immediately adapts to Thai Por's fighting style, and uses her moves to defeat his enemies. After defeating underground Muay Thai champion
Lung Shing-fu, who is also Thai Por's son, Kuen and Fung form the Kowloon Walled City Welfare Association to break the Fellow Association's stronghold in the walled city. While attempting to rescue his Fa Man, he suffers head trauma causing blindness. Together with Fa Man's death and his loss at the hands of Fung he leaves his friends and becomes homeless. Tiu Lan soon convinces him to return and trains to fight without his eyesight. He later helps fight Yeung.
Tiu Lan Tiu Lan (), portrayed by
Nancy Wu, is Kuen's landlady and the owner of a local hair salon within the walled city. She is feisty, bossy, and can be at times too overbearing, but is innately honourable, protective, and compassionate. Her name, Tiu Lan, is a
homophone of the word 刁難 (
Diu1 Laan1), meaning "to give someone a difficult time." Tiu Lan is introduced at the start of the drama as a stingy hair stylist who Kuen meets on his first day back to the walled city. She accepts Kuen as her tenant, but only under the conditions that he takes the night shift job at her salon without pay. Though they often bicker, Kuen and Tiu Lan bond over a
shared secret, which is having a past that they wish to keep hidden. Tiu Lan has an obvious crush on
Fung, which Kuen uses to his advantage. When
Yam-yam dies in Tiu Lan's arms, Tiu Lan gets triggered and kills all of Yam-yam's captors. She suffers a heart attack, but is saved by Kuen and Fung. It is revealed in later episodes that Tiu Lan was trained to be an assassin as a child, under the code name
Sun Mei (辛未;
San Mei). Suffering from a difficult heart condition and no longer willing to kill for The Order, she escaped her captors to live a life of freedom. When her former partner
Kap San reappears in her life, he reminds her that she was one of the child assassins who had lent a helping hand in killing Kuen's father.
Duen Ying-fung Duen Ying-fung (, meaning "welcome the wind") portrayed by
Benjamin Yuen, is Kuen's friend and occasional rival. He is also a dentist, and is often referred to as Ngah Lo (牙佬; "Tooth Guy"; alt. "Tooth Man"). Fung is calm, perceptive, and level-headed, a stark contrast to Kuen's impulsiveness. Fung is the same age as Kuen, having met when they were kids, though Fung does not learn of this encounter until later on. Alvin Lau portrayed 10-year-old Fung. Fung was the son of Duen Tung-tin, a highly skilled Bajiquan master who used to be a protector of the walled city. After his father's death, the family kwoon falls apart and the walled city descends into anarchy, with triads being its virtual ruler. Fung is advised by his uncle to only practice his Bajiquan in secret so he won't fall into the same fate as his father. Along with his uncle, Fung becomes a dentist and opens up a dental clinic in the walled city. Fung's good looks and kind temperament has made him quite popular with the ladies, winning the affections of even
Tiu Lan and her tenants. After witnessing Kuen's bravery while trying to save
Yam-yam from the Fellow Association leader
Fung Ha-moon, Fung decides that he can no longer stay silent. Along with Kuen, he forms the Kowloon Walled City Welfare Association to protect the walled city's people against the intimidation of the Fellow Association. His uncle, upset with this decision, alienates him. No longer welcomed back at the clinic, he moves in with Kuen and Tiu Lan. He gets warped into investigating a drug operation when Bajiquan fighter
Fa Man, who appears to be allied with Fellow Association leader
Fung Chun-mei, asks for his help to destroy the supply. He later proposes to Fa Man, but is deeply shocked as his whole family is killed before his wedding. He later helps kill Yeung in revenge for his family and Man's death, and starts to teach Bajiquan to the residents.
Lung Shing-fu Lung Shing-fu (, meaning "dragon makes tiger"), portrayed by
Philip Ng, is Kuen and Fung's rival. He is a trained fighter in
Muay Thai, and is one of the walled city's most highly skilled martial artists. His mother and Audrey call him by his nickname, "Kitty" (貓仔;
Maau1 Zai2). Fu is composed, stoic, and extremely protective of those he cares about. Fu was born in
Thailand, and is the only son of
Yuk Bo-fung and a
Thai Chinese merchant. After his father's death, his mother brought him to the
Kowloon Walled City to start a new life. Wanting to provide his mother with a better life, he becomes an underground Muay Thai boxer to earn prize money, and also impresses triad boss
Or Man-cheung, later becoming his right-hand man(as revealed in episode 14, Fu killed Or Man-Cheung's previous right-hand man). His mother dislikes Fu's decision of joining the triads and they have a falling-out. Fu occasionally visits his mother at her store, though it always ends up with a scolding. When Or Man-cheung's daughter,
Audrey, returns to Hong Kong from graduating university, Fu is assigned to be her bodyguard. Audrey's kind and warm-hearted personality is unlike that of her father. When Audrey is kidnapped by Fuk Sau-kam, another member of the Fellow Association who believes that Or Man-cheung stole his drugs, Fu nearly sacrifices his life to save her. After Or Man-Cheung's retirement from the Fellow Association, Fu becomes his new restaurant's manager and repairs his relationship with his mother when he begins teaching Muay Thai for a living. Despite Lung shing-fu having the boldness of a man, he completely lacks relationship skills as shown when Or Tak-Li was unimpressed with his attempted proposal at a street foodstand. He asks his mother for advice, then attempts a second proposal in the traditional Thai style with a bucket of water, but it didn't go according to plan. Later on when he encounters Yeung chuk-luen trying to kill Or Tak-li, Fu fought vehemently to defend her from Yeung, he discovered Yeung was the assassin that Chor Au-Kuen was looking for and the one responsible for the mysterious death of Duen's father. In addition, he discovered his
iron shirt skill, as his well-executed strikes was doing no damage to him. Fu was later injured, stabbed in the stomach by a steel rod and dies in Audrey's arms.
Yuk Bo-fung Yuk Bo-fung (), portrayed by
Yuen Qiu, is the mother of
Lung Shing-fu. She is known as Thai Por (泰婆; "Thai Lady"; alt. "Thai Hag") by her neighbours, and owns a general store across the street from
Tiu Lan's hair salon. The two do not get along, but they share similar concerns about the Fellow Association's growing power within the walled city. A Master in
Wing Chun and
Muay Thai, Thai Por becomes Kuen's pseudo-mentor, and teaches him various methods to defend himself against the fighters of the Fellow Association. Thai Por is originally from
Mainland China, but she moved to
Thailand after marrying a
Thai Chinese merchant. After the death of her husband, she and her son, Fu, move to Hong Kong to start a new living. Thai Por is against Fu's decision of joining the Fellow Association, and they have a falling-out until Fu becomes Cheung's new restaurant's manager. After Fu's death, she closes down her store and opens a restaurant and teaches her new daughter-in-law fighting skills.
Fa Man Fa Man (), portrayed by
Grace Wong, is the owner of a wealthy brothel establishment in the walled city, and appears to be allied with
Fung Chun-mei at first. She often uses her beauty and charm to achieve her goals, and weakens her enemies with poisonous traps. Her real identity, however, is a Bajiquan master, disguising herself as a striptease performer so she can infiltrate the Fellow Association. In Episode 13, it is revealed that Fa Man is actually
Chiu Ha (朝霞;
Ziu1 Haa4), Kuen's younger sister whom he believes to be dead after she ran away . Man was separated from her older brother after her parents were framed and beaten to death in 1945. While Kuen escaped to Macau with their great-aunt, Man stayed to bury her parents. Man was believed to have died after she cremated her parents, as the cremation caused a wildfire all over the mountainside. Believing her father's innocence, Man assumes a new identity and infiltrates the Fellow Association to search for the true killer. She discovers that the Fellow Association's three leaders—Fung Chun-mei,
Or Man-cheung, and
Fuk Sau-kam—were the three men who attacked her father in prison. Fuk Sau-kam becomes her first victim when he plans to escape the walled city. Fung Chun-mei is her second victim, Fa Man kills him after betraying and ruining him. She was unable to fulfill her last task at killing Or Man-cheung, as he was aware that there was someone targeting him. When all seemed at peace at the Walled City Fa Man and Duen Ying-fung gets married, but happiness is not long lived when Fung's entire household is murdered on their wedding day. Fa Man finds out that Yeung Chuk-luen is the mastermind behind all the evil in the Walled City after picking up dope at his pastry shop. She was later ambushed by Kap San and his henchmen who severely injure her. With her brother's failed attempt to protect Fa Man from the assassins, she was stabbed in the stomach by one of the assassins and died.
Or Tak-li Or Tak-li (), portrayed by
Moon Lau, is the daughter of
Or Man-cheung. Also known by her English name
Audrey, she is introduced at the start of the show as a university graduate who recently returned to Hong Kong from overseas. Fascinated with the culture of the walled city, she volunteers for a teaching post at a local public school in the city and becomes acquainted with Kuen, who she takes a liking to. After discovering her father's involvement with the Fellow Association, she threatens to leave him, forcing him to retire. Audrey develops a close relationship with her body guard,
Lung Shing-fu. It is later revealed that Audrey's actual biological father is
Yeung Chuk-luen who had an affair with Or Man-cheung's late wife. ==Main antagonists==