A creative and fashion-forward member of the Baby-Sitters Club, Claudia serves as the vice president and is known for her leadership abilities as well as her artistic talents.

Kristy's best friend and the club’s secretary, Mary Anne is characterized by her reserved nature and strict upbringing, which gives her a level-headed approach to babysitting.

The newest member of the Baby-Sitters Club, Stacey hails from New York City and is distinguished by her stylish appearance and unique experiences that shape her role in the group.

A loving and patient character who navigates her family's dynamics and busy life as a single mother until she announces her engagement, impacting the family's future.

Kristy's younger brother, for whom Kristy frequently babysits, giving her the initial experience and responsibility that contribute to her role in the Baby-Sitters Club.

One of Kristy's older brothers, who shares a mutual crush with Stacey, adding a personal connection to her involvement with the Baby-Sitters Club.

Kristy's mother’s boyfriend, later fiancé, who plays a significant role in the changes within Kristy's family dynamic and her adjustment to those changes.

Watson's talkative and imaginative daughter, whose vibrant personality adds an element of interest and challenge for the babysitters, particularly Mary Anne.

Watson's quiet and introverted son, who gradually forms a bond with Kristy amidst the new familial relationships.