Zofia's best friend, Janina is a kind-hearted Jewish girl with aspirations to be a teacher, who faces increasing hardship as her family is affected by the Nazi occupation.

Zofia’s mother, known as Matka, is a confident and capable woman whose initial coldness masks deeper emotional struggles, eventually transforming through the wartime challenges she faces.

Zofia’s romantic interest, Darek is a sensitive and artistic young man who plays a critical role in the underground resistance while sharing Zofia's dedication to the library and books.