Yurius

Julius was the prince of the Grannvale Empire, the son of Emperor Arvis and Deirdre, and the twin brother of Julia. He was the product of the extensive schemes of [Manfroy]() of the Loptr Church, to create a living vessel to reincarnate the Dark God [Loptous]() by breeding a child bearing full Loptous Holy Blood from the bloodline's two living minor carriers, Arvis and Deirdre.

Several years prior to the rise of Seliph's liberation army, Julius became subject to Loptous's corruption upon receiving the evil god's unholy tome. Under Loptous's influence, Julius successfully wrested control of the empire from his father and twisted it into a brutal regime, reintroduced the child hunts and gave Loptrian priests positions of power in the Empire. His ultimate goal was for Loptous to eventually take full possession of him and, by extension, of the Empire, and from there to resurrect the ancient Loptrian Empire.

(Source: Fire Emblem Wiki)