Jenna is a high school senior and the only daughter of Chinese immigrant parents. She feels perpetually overshadowed by her conventionally attractive, high-achieving cousin, leading to deep dissatisfaction with her own life. Despite possessing sensitivity and artistic talent, she craves the external validation her cousin receives. After experiencing a painful college rejection, she makes a desperate wish on a shooting star that triggers a bizarre body-swap.

Jessica is Jenna's high-achieving cousin who attends the same high school. She is popular and outwardly flawless, serving as the standard of perfection in her family and school. Behind her polished exterior, she faces immense pressure to maintain her unparalleled academic standing. Her rigorous schedule leaves her secretly exhausted by the constant expectations placed upon her.

Aaron is a high school senior who recently returned from an intensive medical youth program in Paris. Having lost his mother at a young age, he is deeply passionate about pursuing a career in medicine. Unlike many of his peers, he is motivated by genuine interest rather than competitive drive. He shares a long history with both Jenna and Jessica, and he is unusually observant regarding changes in their behavior.

Leela is a high school student who runs in Jessica's inner circle and shares an art class with Jenna. While she is friendly with both cousins, she alters her behavior depending on who she is around. She feels intimidated by Jessica's academic perfection but acts more naturally and vulnerably around Jenna.

Celine is one of Jessica's closest friends at school. She is highly focused on quantifiable results and natural talent, which shapes how she judges her peers. She openly admires Jessica's brilliance but holds dismissive views of those she considers untalented or average.

Cathy is a prodigious younger student who skipped several grades due to her academic excellence. She constantly competes for the top spot at school but frequently finds herself coming in second to Jessica. The intense academic environment places a heavy burden on her, making her highly sensitive to her perceived inadequacies.

Lachlan is a wealthy legacy student whose family has been associated with the high school for generations. He lives in a world of trust funds and entitlement, believing his social status should guarantee him specific accolades. This entitlement leads to open resentment when he is outperformed by peers.

Jenna's mother is a hardworking Chinese immigrant striving to provide a good life for her family. She holds high academic expectations for her daughter, frequently comparing her performance to Jessica's in hopes of motivating her, though this approach causes tension.

Jenna's father is a working-class man who desires academic excellence from his daughter. He points out ways Jenna could improve by using her cousin as an example, inadvertently fueling Jenna's deep-seated insecurities about her worth.

Jenna's wealthy aunt, who lives a lavish lifestyle. While she boasts about not needing to micromanage her daughter's academics, her love and esteem appear closely tied to Jessica's flawless performance, creating intense underlying pressure in their household.

Jenna's uncle, a wealthy and successful man who takes immense pride in his daughter's accomplishments. He provides a comfortable, luxurious life for his family but contributes to the high-pressure environment surrounding his daughter.

Mr. Howard is the school director. He values students based on their marketable results and wealthy backgrounds, paying more attention to students with elite social status than to those relying purely on academic merit.

Ms. Lewis is a teacher at the high school. She holds star students to impossibly high behavioral standards, expecting them to endure insults without retaliation to maintain their pristine reputations.

Sarah is a student at the high school who comes from a wealthy, privileged background. She easily captures the attention of the school administration due to her family's social connections and country club lifestyle.