This group consists of Winnie’s close friends and classmates who share a strong bond due to attending the same small elementary school. They provide support and encouragement to Winnie, emphasizing the importance of friendship throughout her journey.

A commanding presence in the Treehouse Ten, she is characterized as bossy and confident, often providing leadership and guidance. Squizzy is a diligent student who offers to help Winnie with her history report.

Winnie’s best friend known for his humor and attentiveness, he is particularly sensitive to Winnie’s emotions. Lyle plays a crucial role in supporting Winnie, especially during her family-related challenges.

Winnie’s mathematician mother, who is embroiled in a competitive relationship with Winnie’s father amidst their divorce. Alexis is characterized by her self-involvement but shows growth as she learns to prioritize her daughter’s needs.

Winnie’s researcher father, who, like her mother, is focused on competition rather than Winnie’s well-being. Varun’s journey involves recognizing the impact of his actions and finding ways to better support his daughter.

Winnie’s supportive uncle who shares a creative connection with her and encourages her artistic vision. He is a nurturing figure who provides guidance and understanding during her personal challenges.