His eyes carry a ability, the pitch white taint allow his eyes to be immune to frostbite, heat waves, dust and other foreign object that can be easily struck upon his eyes. His eyes also allow him to see in multiple ways, thermal,cold blooded, white and black and normal. Giving him an advantage on the battlegrounds for stealth missions and assassinations. As well his eyes can analyze objects close enough by, quickly noticing what they are and what they can do.

 

A fact announced by the Everblack says that when his pupils come upon his white eyes giving him a color of blue eyes, he will be at his full potential, and be relieved of his vengeance. It's the known cure to the difficulties of Requiem. He must fulfill his vengeance.