Cyril Kerularios was a prominent Byzantine nobleman who currently acted as the leader of the hawkish faction within the Byzantine court. After the untimely death of the second Prince Decentius Palaiologos, he and his allies lost a significant amount of power and influence within the Empire's politics.
What was supposed to be the resurrection of a glorious, and expansionist Roman Empire instead devolved into a pacifistic if not outright cowardly Greek State led by the First Prince Quintus Palaiologos and his dove backers.
It was precisely because of this that the eastern successor of the ancient Romans now found themselves in the most precarious position since the fall of Rome nearly one thousand years prior. With the ever decreasing popularity of the Palaiologos dynasty and the disastrous consequences of their actions. Cyril had been working tirelessly in the background to see the royal bloodline dethroned, and instead replaced with his own dynasty.