Jack Braun is a 14-year-old boy. He is the older brother of George. He teases and bosses his little brother George around but is still very friendly to him. He is tough, for a 14 year old, and would want to join the army like his dad in Africa fighting the Germans. He and George have been in many difficult situations but Jack had managed to get them out with his quick thinking. Their grandfather is German but they both are Canadian.