Eiji gottheir father's eyes. I wonder did

I think he did cause out of all siblings he’s the one that looks most like the emperor with exception of his eye, he’s a carbon copy of the Emperor. It was mentioned during Eiji P.O.V before meeting the twins that one of the servants told Eiji that Arjen looks exactly like the Emperor. Eiji has the same eye colour as the Emperor and Arjen looks exactly like him.

Yhea it is