Crowley, born as Arthurias Davere di Fioria, was the son of Augustus Davere de Fiora and Marceline Andares de Fiore and the younger brother of Helena Emeraldes de Fioria. They were what was considered royalty at the time, those who had the closest blood relationship to the Crown of the country. In fact, their relationship was not that of cousins or far-fetched family, but Augustus was the younger brother of Zantedeschia di Fiore, previously known as Zantedeschia Armande di Fioria. The current king, his uncle, had been a part of his childhood ever since he could remember.
His father, Augustus, never had an interest in becoming the ruler of the country. He disliked the political games that were played in the capital city and instead decided to use his authority to rule over the lands in his command as good as possible. The relationship between Zantedeschia and Augustus became colder when Zantedeschia kept trying to expand the borders of the country to please the nobility and kept requesting men from Augustus' region. Augustus had seen what the war had caused would no longer oblige into satisfying his older brother's demands to leave behind a generation of children growing up without fathers, and wives raising them without their husbands.
When Zantedeschia's health became an issue, he believed that the nobility was scheming behind his back to find a successor. Since Zantedeschia had no children, it would go to Augustus and then his children. Unwilling to accept that, and driven by madness, he carried sent out an order to assassinate Augustus under the guise of a revolt taking place in his lands, or perhaps foreign invaders with whom he had possibly conspired against him. It didn't matter; in the end, Zantedeschia would find a false reason to cover it up. Meanwhile, he invested most of the money which was reserved to invest into the infrastructure for the future of the country in his research to find a way to extend his lifespan. The moment he came back to his senses when they told him that they had found a method to cure him, the assassination of his younger brother and the entire family had already taken place.
Unknown to his knowledge, the youngest, his nephew, had survived the whole ordeal. Along with the person whom he considered his brother, he had fled from the incident. Icarus, who had been seen Zantedeschia countless times along with his men, recognized one of the assailants. After explaining everything to Arthurias, the two of them formed a plan which would affect and shake the country's foundation. After a few years, they found out that Theseus was still alive and sent to be executed in Era for the death of Arthurias' family. Apparently, they had brought out the story as an internal uprising.
When Arthurias and Icarus had regained their power, they had their first targets in mind, the Solace. At its head stood Cornelius Barlais le Solace, a cousin of their father and the king. He was a crude man who appeared gentle to the world outside that could not be grasped by commoners. His sickening tendencies secretly revealed itself in the form of hunting commoners who he had kidnapped. Cornelius was also the one who shared the borders of his land with their father and the only person being able to navigate that easily through Augustus' properties with such a large group at night without alerting anyone else. When they confirmed their suspicions, they started what would become known as a reckoning amongst the nobility.
The entirety of the country had fallen into chaos. Quickly, Arthurias' militia began to grow in numbers. No beautiful lies were told to reach these numbers. Instead, they all sought out Arthurias to aid him after they found out that he was behind the murder of the Solace. Families who had lost their relatives to these actions, and families who were involved in similar situations involving the invincibility of nobility all supported. In time, his militia got dubbed as Grimoire Heart as a reference to their hearts after all wrongdoings by the wicked games of nobility. He knew the ranks of the Crown were filled with nobles who got assigned to the safest and most prestigious role to guard the king because of their ties. Meanwhile, Grimoire Heart was mainly composed of those who were willing to give their lives for a shared ideal.
Today, Arthurias would reveal himself to the bubble which the nobility considered their small world. He would reveal himself to his uncles, aunts, and cousins, and murder his uncle, Zantedeschia di Fiore with his own hands.