Number the stars Who was Peter Nelson?

In "Number the Stars" by Lois Lowry, Peter Nelson is a young man who is a close friend of the Johansen family and is also involved in the Danish resistance against the Nazis during World War II. He is portrayed as brave and dedicated, helping to protect Jewish citizens, including Annemarie's friend, Ellen. Peter's character symbolizes the courage and sacrifices made by individuals during this tumultuous time in history.