Grey hair and grey eyes.
(OY 1268) Edit
Edgar appears to hate Ernesti, when Ernesti attended (InsertClassLesson)
(OY 1271) Edit
Edgar asked Ernesti if he wanted to go inside of his Silhouette Knight,to which Ernesti was hesitant but was reassured by Edgar who replied "not to pilot it but to take a look inside". Edgar has a funny look, that looks like a killing intent face, when he open Earl-Camber's cockpit while Ernesti was looking inside.