When Artie decided to collect Dignity from Callum that day, he only knew that losing that sword was a path to greatness. Moreover, all of it would be possible because of Artie Shen, a girl that happened to be the archduchess of the plains. If he didn't even come to Ellis Plains a day after Artie dropped from the castle ceiling, he wouldn't even have a chance to become a Grand Duke of a kingdom.
In his eyes, she was a very reputable figure that could not be slandered. When she wore that white dress just earlier, he knew in his heart that this woman was something big that he had already missed out on. However, she was still magnanimous enough to choose him as her facet in Musanea.
Artie Shen even decided that Callum was worthy to start his own demon bloodline through this great demon's blood. He didn't know what kind of primordial blood House Princesleys had, but he would be the first to wield the Great Illum's blood to become a full-fledged Grand Duke.