
N e ways face reveal of Dieter I saw in a comment if u haven't seen the comment:
https://poipiku.com/IllustViewPcV.jsp?ID=70280&TD=3599383

Royals during this timeline often had incestuous relationships and have a child, and those children tend to have mental or physical disorders. If counting the possibility of the duke's parents being siblings or at least cousins, it's very unusual that they are in perfect condition. I wouldn't be surprised if the duke's child had a cane to help him walk or something...
GO BLUE HAIR BOII!! THAT'S HOW YOU BECOME A PROPER RIVAL!!!!