Her father took it from her and examined the broken clasp. "Yes," he said. "I can fix it. When the Rosens come home, you can give it back to Ellen."
"Until then," Annemarie told him, "I will wear it myself." (17.25-26)
You know that lucky penny you carry around, or the friendship bracelet that's so worn its almost falling off your wrist? Well, like these items, the Star of David necklace is an important part of Ellen's identity. It reminds her of her Jewish faith and her relationship with her father who gave her the necklace. In order to make it safely through the war, Ellen had to leave the necklace behind. But by wearing the necklace in Ellen's place, Annemarie is making a statement: it's okay for her friend to stop hiding and honor those parts of her identity.