It's mention that the duke family branched off the imperial family long ago and that's why they have the same blonde hair since Helene comes from royalty. It is weird when you think about it but at least it's not direct relatives I guess...
And it's very common with nobility to marry someone they're related to
But they look like they came from the same womb,same eyes same hair and all
Still very common. That's why a lot of royalties back then have a lot of deformities and health issues due to incest.
Hmmmm
Am I the only one who thinks the duke and Helene look like twins it’s throwing me off icl LOL