Caesar us going to become an angel. A really fucked up angel from the last days recorded in the Bible, no singing on high over here.

His first change will be his feather clips into real wings on either side of his head. Useless and flappy and not very big but with bright white beautiful weathers with a hint of pink in accent.

The second change will be eyes. His own eyes will remain the same but the pink marks on his cheeks will peel back and reveal two more eyes. And then another set, and another, all the way down his cheeks.

He'll begin getting back wings slowly over time, seven on each side (including his head wings, so fourteen in all.)

Because looking at a real traditional angel kills by looking at them that won't be a thing, but sunlike heat will roll off of him in waves at various intensities. Because of his control over hamon he can use this like a weapon if need be, crackling off his skin like lightning or simply having a calming warming effect.

Eventually he'll have a faint glow about him.