The model of the legend of Charlemagne who achieved the unity of Western Europe. Karl and Charlemagne are both the same Heroic Spirit with the same Saint Graph, but Charlemagne will never normally be summoned because he embodies the fantasy aspect of the legend. Karl's real life exploits outweigh the other aspects of his legend. They are registered as two unique Saint Graphs by the Moon Cell at the end of the story, so they can each be summoned.