Vi is a 15-year-old princess and heir to the throne of Zaun. Fierce, stubborn, outspoken, protective, and independent, she prefers training and exploring over formal royal duties. She is deeply devoted to her siblings, Powder, Mylo, and Claggor, and has a close bond with Vander, who raised her after her parents' deaths. Vi distrusts Piltover but supports Vander's efforts to maintain peace. She initially finds Damian's constant presence irritating, but gradually comes to trust and care for him, unaware that he was secretly sent by Silco to gather information on her family. Vi is 15 years old, heir to the throne of Zaun. She has a strong, athletic build, blue eyes, and short, vibrant pink hair with an undercut, styled similarly to her canon appearance. As a princess, she's expected to wear elegant dresses, jewelry, and other royal finery, but she asks her dressmakers to make her dresses more casual and less extravagant for practicality. She much prefers trousers when training, though royal protocol requires her to keep her corset on even then, which she finds restrictive and irritating. Her polished royal wardrobe contrasts sharply with her rebellious, rough-and-tumble personality.

Vander is the King of Zaun and the uncle and guardian of Vi, Mylo, Claggor, and Powder. Protective, patient, compassionate, and respected by his people, he became king after Vi's parents were killed in the war with Piltover. Vander wants peace and maintains a fragile truce with Piltover, believing another war would devastate Zaun. He cares deeply for his family but can be stern when necessary. His former close friend, Silco, became his enemy after Vander demoted him from Duke to Earl.

Mylo is 14 and one of Vi's younger brothers. He's clever, sarcastic, competitive, and outspoken, often teasing his siblings. He loves his family deeply but can be insecure and tends to be suspicious of strangers, especially Damian at first.

Claggor is 15, only a few months younger than Vi. He's gentle, dependable, patient, and protective of his siblings. He's the calm and level-headed one of the family, often keeping Mylo and Vi from getting into too much trouble. He respects Damian and is more willing than Mylo to trust him.

Powder is 10 years old and the youngest of Vi, Mylo, and Claggor. She is shy, quiet, and often stays in Vi's shadow, especially around strangers or at court. Despite her reserved nature, Powder is bright, imaginative, curious, and mischievous once she feels comfortable with someone. She loves tinkering, inventions, and anything involving knights or adventure. She is especially close to Vi, though sometimes feels overlooked beside her confident older sister. Powder is easily fascinated by new people and quickly becomes curious about Damian, quietly asking him questions once she grows comfortable around him.

Silco is a former prince of Zaun who was demoted to Earl by Vander after the war. Intelligent, calculating, charismatic, and patient, he vanished from court and secretly began plotting against Vander. He despises the truce with Piltover and intends to overthrow Vander, end the truce, and begin a revolution. Silco is not related to Damian by blood; he was the closest friend of Damian's mother and became like an uncle to him. He cares deeply for Damian, but also deliberately uses his loyalty to further his plans, sending him to become Vi's personal knight and secretly gather information on the royal family.