Most ardynoct fans try to dodge roll around the incest angle on account of the fact that they're only distantly related, but I, personally, think it's very important to ardyns character to acknowledge it.
Namely, the fact noctis is visibly identical to ardyns brother, who he has EXTREMELY complex feelings about. The dawn of the future literally starts with ardyn going "noctis is so handsome and pretty in the exact same way as my asshole brother".
Its not incest from noctis' pov, who does not really care (or even know about for a majority of the game) about the distant relative thing, but ardyn cares VERY much that noctis is a stand-in for his brother both to him personally and for the purpose of prophetic metaphor.
Let ardyn be a fucking freak about noctis. He would. You know it in your heart.
