Emperor Charles II of Frankia

Emperor Charles of West Francia - Ruler in Paris, he witnesses Ragnar's attack on the city and later employs Rollo as a defender against Viking raids. Charles is a composite character drawing from the historical Charles the Bald (grandson of Charlemagne who first defended Paris from the Vikings), Charles the Fat (who commanded Odo) and Charles the Simple (who encountered Rollo, and may have had a daughter Gisela).