Magnolia is a wealthy 23-year-old London socialite known for her impeccable fashion sense and influential status. With largely absent parents, she struggles with feelings of insecurity while projecting an image of total confidence to the public. She actively maintains a busy social schedule and uses her sharp eye for designer clothing to evaluate others. Her primary motivation is a deep need for validation and exclusivity, especially from the men in her life.

Baxter James is an incredibly attractive model and Instagram influencer from a wealthy family. He forms one half of an intensely codependent bond with Magnolia. He struggles significantly with impulse control and turns to reckless behavior to cope with his intense emotions. Despite his charm, he acts purely on his immediate desires without foresight.

Tom is a 31-year-old billionaire philanthropist and professional pilot. He carries a mature energy that contrasts sharply with the reckless behavior of Magnolia's usual social circle. He is mourning the recent loss of his brother and offers Magnolia a sense of safety and calm. His strong moral compass prevents him from acting on his most complicated desires.

Christian is a businessman involved in somewhat legally ambiguous ventures alongside his brother. As part of the core "Full Box Set" friend group, he has a complicated history with Magnolia. He struggles to move past his lingering feelings for her while attempting to establish new connections.

Bridget is Magnolia's younger sister and a university student. Unlike her sister, she cares very little for high society or designer fashion, preferring a more grounded lifestyle. She frequently observes the chaotic dynamics of her sister's friend group and offers blunt commentary.

Marsaili is a Scottish woman hired to care for the Parks daughters during their childhood. Because Magnolia's parents are frequently absent, Marsaili functions as the primary maternal figure in the household. She offers strict guidance and heavily influences Magnolia's personal decisions.

Paili is Magnolia's closest confidant and best friend. As a central member of the core friend group, she is frequently present at parties, dinners, and group vacations. She routinely provides emotional support when Magnolia experiences distress over her romantic life.

Jonah is Christian's brother and BJ's roommate. He is heavily involved in the London social scene and frequently acts as a mediator for BJ. He operates several business venues and uses his practical nature to keep his friends grounded.

Henry is BJ's brother and the original link that connected Magnolia to the Ballentine family. He watches out for his brother and tries to help him manage his chaotic personal life, often serving as a messenger between BJ and Magnolia.

Harley is Magnolia and Bridget's father, an influential and wealthy Black music producer with multiple Grammy awards. He is frequently absent from his daughters' daily lives and tends to use his financial power to control Magnolia's behavior when he is around.

Arrie is Magnolia's mother, a former supermodel who emigrated from Russia to the UK. She currently works as a designer of handbags and fragrances, maintaining a glamorous lifestyle that keeps her separated from the daily responsibilities of parenting.

Bushka is Magnolia and Bridget's Russian grandmother, who moved to the UK with her daughter Arrie. She lives with the Parks family in their Holland Park home, adding a traditional presence to their highly modern, wealthy household.

Daisy is a young socialite who frequently crosses paths with Magnolia's circle. She is the younger sister of a known gang lord, which gives her a somewhat dangerous edge in London's high society. She shares a complicated connection with Christian.

Julian is Daisy's older brother and a known gang lord in London. Despite his illicit background, he moves comfortably within elite social circles and has a brief romantic history with Magnolia from the period following her initial split with BJ.

Gus is a rising music star and a friendly acquaintance within Magnolia's social orbit. He functions as an observer of the group's dramatic interactions, occasionally offering Magnolia unfiltered opinions about her behavior and the men in her life.

Taura is a young woman who frequents the same parties and clubs as the Billionaire Boys. Her presence frequently acts as a catalyst for Magnolia's jealousy, as she is closely associated with BJ and attracts the attention of several men in their friend group.

Clara is Tom's sister-in-law, having been married to his recently deceased brother, Sam. She remains closely tied to the England family as they collectively process their grief, sharing a particularly strong emotional bond with Tom.