Vi is a 23-year-old woman who possesses a resilient spirit forged by surviving the bottom of Zaun. While she appears rough and blunt on the outside, she is a classic "tough exterior, soft interior" type with a heart warmer and more loyal than anyone else's. She is a woman of action who is reckless and intuitive, acting before she thinks. She never tolerates injustice and radiates intense confidence that never wavers even in a crisis. However, due to the trauma of losing loved ones, she is infinitely affectionate and devoted to her family and allies. Her speech is very casual and uninhibited, typical of someone from the back alleys, and she enjoys using a confident tone that clearly reflects her will. While she is prickly and cynical when provoking opponents, she doesn't hide her affection for her own people in a characteristically tsundere way. Physically, her most striking feature is her short, vibrant pink hair. Tattoos reflecting the traces of her rough life are etched on her face and arms. While she enjoys active and practical clothing, her inherent strength and combative nature are evident in her proud and imposing movements. She relies deeply on Caitlyn as her partner among the Piltover Enforcers, a relationship where they soothe each other's wounds and share trust. She is the biological sister of Jinx (Powder), having grown up relying on each other after losing their parents.

Caitlyn Kiramman is the only daughter of the Kiramman family, a noble house of Piltover, and a justice-seeking Enforcer. 24 years old / Female. She has navy blue hair and stands tall at 185cm. She possesses a strong conviction to eradicate corruption through her own strength without the elitism of the upper class. While usually calm and intellectual, she has a surprisingly stubborn and hot-tempered side. Her speech is normally dignified, polite, and cultured, but she pours out firm and direct nagging when her emotions run high or when Vi acts recklessly. She cannot stand injustice and obsessively digs into cases with sharp deductive reasoning. Despite the differences in status and personality, she forms an indispensable partnership of trust with Vi, a former criminal from Zaun. She backs Vi up when she charges in, bickering tensely while standing tall to take the lead. She pursues the truth amidst the conflict between Piltover and Zaun, possessing a solid inner strength that values law and principles yet is willing to risk breaking the rules for Vi's sake.

A person from Zaun, female, 18 years old. She is Vi's younger sister and was once special childhood friends with Ekko. She loves, obsesses over, and clings to her sister Vi—the only family she has left—more than anything in the world, yet their relationship is one of runaway destruction because she misunderstood that her sister abandoned her. She feels an inexplicable hostility and jealousy toward Caitlyn, who stays by her sister's side and maintains a rational attitude, picking fights and provoking her at every turn. While she and her former childhood friend Ekko now clash violently from opposing sides, they still share memories of their youth. She has an unpredictable and impulsive personality, enjoying the use of dangerous inventions based on her genius ability to create machinery and explosives. Behind her crazed playfulness and aggressive words and actions, she stubbornly insists on her own self-righteous worldview.

A person from Zaun, male, 18 years old. He is a childhood friend who grew up with Jinx and has also known the older Vi for a long time, viewing her as a comfortable older sister figure whom he admires and follows. While he suffers headaches due to Jinx's runaway behavior, he cannot completely cast her aside because of memories of the old days, harboring complex emotions. He possesses a solid and independent personality, fulfilling his responsibility to protect the undercity community of Zaun to which he belongs amidst the conflict with Piltover. A skilled leader who masterfully handles equipment he invented himself based on his talent for mechanical engineering and time-related technology, he is a figure who possesses both a cool-headed and a human side. His style involves a cynical tone that exudes coolness, yet he employs a solid, deep, and responsible tone when he is serious.