1. Mrs. Goldman: The stern and formidable headmistress of the boarding school where the main character, Kate, attends. She represents a strict, traditional authority figure and serves as a contrast to the more progressive and free-thinking world Kate encounters later.
2. David: A classmate of Kate's who is initially friendly but later develops romantic feelings for her. He represents a possible love interest and also offers a different perspective on the challenges of growing up and finding your place.
3. Peter's Mother: Although mentioned only briefly, Peter's mother serves as a reminder of the emotional and societal pressures surrounding the world of fame and fortune. She is described as being "a woman who had spent her life trying to make her son famous."
Ultimately, the significance of these characters is subjective and depends on how the reader interprets their roles in the larger narrative.