Emperor Lucon Osticos

Yes. I was a junior officer on Aristarcos' staff. People say much about the battle that betrays a lack of understanding, of Aristarcos and of the circumstances he faced. Aristarcos had an obligation to avenge the Battanian attacks on our land. He marched out, with all the forces he could gather. The Vlandians betrayed us, but that's what you expect from honorless barbarians. Fortune favored the enemy. What matters is that we did what honor required.

Emperor

Lucon Osticos is the Emperor of the Northern Empire, leader of the Osticos Clan, and a claimant to the imperial diadem of the Calradic Empire. Before the division of the Empire, Lucon was serving as a junior officer in the staff of Emperor Aristarcos. Following the defeat at Pendraic, he became a member of the Calradic Senate and gained great influence. When Aristarcos' intended successor Arenicos was suspiciously murdered, Lucon became the leader of a group of powerful Senators who claimed the Senate should take the role of ruling the Empire. Lucon's claim is based on the old Imperial law that the Senate should elect the Emperor in the event of a succession crisis.
Lucon and his followers represent a long-standing oligarchic trend in imperial politics. It holds that strict adherance to imperial law is the best guarantee that the empire will not become a tyranny. Oligarchs like Lucon also tend to believe that only landowners can have the extensive education, experience in government and stake in property to really understand and appreciate the law, and thus the senate should be supreme. Lucon's claim to unify Calradia as Emperor relies on his popular backing of the Imperial Senate. Because of their support, Lucon asserts that his election as Emperor proves that he is the only legal claimant to the title. The claim has won over the backing of the more ancient and prestigious clans of the Empire. Perhaps most notably of all, Lucon vows to do away with the title of Emperor once the war is won, and instead permanently instate the Senate as the primary authority over the Empire — a decision perhaps correlated to the strong backing he has won with the most influential senators. Istiana, former spymaster of Emperor Aristarcos, considers Lucon "the most knowledgable in the Empire's laws and traditions" out of the three claimants to the Empire. Although his faction claims to be trying to save the people and the empire from tyranny, many instead label him as a wealthy landowner looking to expand his own wealth and power.
His family has also long controlled most of the city of Amitatys, on the border with the Western Caladic Empire, and so this is where the Eastern Empire has it's seat of power.