Character Relationship Map: Sugar Rush

Characters

• Kim (played by Olivia Hallinan) — protagonist

  Kim is a fifteen-year-old who moves to Brighton with her family and serves as the central viewpoint of the series. She develops a crush on her best friend Sugar, repeatedly tries to win her affection,...

• Sugar (played by Lenora Crichlow) — protagonist

  Sugar is Kim's heterosexual best friend, known for reckless drinking, frequent sex with men, and a lack of interest in school. She becomes the focus of Kim's romantic hopes and takes advantage of Kim'...

• Nathan (played by Richard Lumsden) — supporting

  Nathan is involved in a second-series side plot with Stella, as the two attend sex therapy together and become more adventurous in their sex life. His storyline is separate from Kim's central romantic...

• Stella (played by Sara Stewart) — minor

  Stella is Kim's mother and has a prominent family side plot across the series. In the first series, she has an affair, while in the second she attends sex therapy with Nathan and becomes more adventur...

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Kim → Nathan (Father-daughter relationship) — Nathan is Kim's anxious father and a continuing domestic anchor, although his limited understanding often leaves Kim emotionally isolated.

  "Nathan is identified as Kim's dad, worries about her condition in Episode 7, and tries to respond to problems in the household. Kim also remains conn...

• Kim → Sugar (Unrequited attraction and unstable romantic entanglement) — Their bond begins as Kim's idealized crush and develops into a volatile attachment shaped by jealousy, rejection, emotional dependence, and repeated rescue.

  "Kim develops a crush on Sugar in Episode 1, becomes increasingly obsessed with her, sabotages Sugar's relationship in Episode 5, and reacts intensely...

• Kim → Stella (Stepfamily relationship) — Their stepfamily connection is filtered through secrecy, mutual exposure, suspicion, and embarrassing household consequences.

  "Stella is Kim's stepmother, and Kim catches Stella having sex with the handyman in Episode 1. Stella later wrongly suspects Kim's pills indicate an o...

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Nathan → Stella (Betrayal and domestic confrontation) — Their conflict is driven by infidelity, humiliation, resentment, and incompatible attempts to control the terms of their relationship.

  "Nathan learns that Stella has been unfaithful in Episode 5, sends her belongings in insulting boxes in Episode 6, rejects her abusive attempts to mak...

Story Analysis

The single-season narrative follows Kim's emotional awakening through her unstable attachment to Sugar, while the collapse of Nathan and Stella's household provides a parallel story of secrecy, betrayal, and failed repair.

Plot Progression

1. Season 1: First Attraction — Kim meets Sugar and immediately becomes fascinated by her. Her uncertainty about her sexuality develops alongside the first signs of secrecy within the family home.
2. Season 1: Household Secrets — Kim witnesses Stella's affair and chooses revenge instead of immediate disclosure. Anxiety around pills, illness, and domestic contamination makes the family instability increasingly visible.
3. Season 1: Jealous Escalation — Nathan discovers Stella's betrayal and the household fractures. Kim sabotages Sugar's new relationship, revealing how strongly jealousy controls her decisions.
4. Season 1: Failed Reinvention — Kim withdraws while Sugar avoids directly addressing Kim's feelings. Both the family reconciliation attempt and Kim's attempts to pursue heterosexual or alternative relationships fail to provide stabi...
5. Season 1: Flight Into Chaos — Kim abandons a developing relationship when Sugar calls for help. After Sugar's violent crisis, the two leave toward London using improvised and illicit means.