Who are the main characters in silver sword?

In "The Silver SWord" by Ian Serraillier, the main characters are Joseph Balicki, a Polish schoolteacher who is separated from his family during World War II; his wife, Margrit, who is taken by the Nazis; and their three children: Ruth, Edek, and Bronia. The story follows their harrowing journey through war-torn Europe as they strive to reunite and survive. Joseph's resilience and the siblings' courage are central to the narrative, highlighting themes of hope and perseverance amid adversity.