A 14-year-old girl who becomes one of Peg's closest friends during their rehabilitation at the Sheltering Arms. Despite living with limited mobility, she remains cheerful and supportive.

A 12-year-old girl, like Peg, who spends time in an iron lung before coming to the Sheltering Arms. Her friendship with Peg continues beyond their time at the rehab center, exemplifying the importance of connection.

A resident of the Sheltering Arms for many years, having been abandoned due to her polio diagnosis. Known for her singing voice, she gains confidence through connections and friendships formed there.

A 14-year-old with severe health issues resulting from polio, including limited mobility and breathing difficulty. Her time in the hospital highlights the severe impact of the illness.

Peg's mother, who plays a crucial role in ensuring her daughter receives timely and effective treatment for polio. Her compassion and love are ever-present through her support.

Peg's father, known for his humor and dedication to supporting his daughter through her recovery journey. His encouragement is instrumental in helping Peg regain strength through music.

Peg's older brother who provides sentimental support through teddy bears during Peg's hospitalization. These gifts symbolize family love and encouragement from afar.

A young and kind intern at University Hospital who becomes Peg's favorite doctor. His supportive presence and reminders of a promise keep Peg motivated during her treatment.

An eight-year-old boy in an iron lung with whom Peg forms a quick connection during their shared time at University Hospital. Their friendship is built on shared experiences and hope.

A gentle and encouraging physical therapist at the Sheltering Arms who helps Peg through her physical recovery. Her positive approach makes therapy sessions rewarding rather than daunting.

An Australian nurse whose innovative treatment methods are crucial to Peg's recovery process. Her techniques are widely adopted and help numerous polio patients like Peg.