I guess They're extremely fraternal
That must be it.
Honestly, I was thinking how in the world when they just mentioned that he was his full-blooded brother, let alone twin they don't even look like they share genetics
Exactly.
Well I suppose if you can have one twin that looks black and one that looks white surely you can have this? Also I went to HS with some twins (a bunch of twins actually) one a dude one a chick and they didn't look very alike. She had this beautiful orange hair and he had a dirty blond colour. Genetics are strange things ╮(￣▽￣)╭
How are they twin brothers?? They look nothing alike. Anywho, the emperor is HOT. Our duke will slaughter half of the empire IF they execute his baby.