He is apparently Edge Lord #123. Headcanoning that eye got cut out during a fight with a sibling over the throne.
Lowly green units, man.
May be in character, if exaggerated...slightly related is I joke about an unplanned bastard kid of those two, just took a single one night stand and of course Edelgard can't parade around who the father is unless it was a legit politically approved deal. Kiddo combines his/her parents' houses into Navy Gryphons though and cat's out of the bag now. Yeah, it's not serious, kind of a crack ship but there are weirder crack ships.
Shapeshifter promotions are something me and @Anacybele have played with as an idea, but with laguz, like cat promotes into wild cat. We've also made up laguz. I threw wolves into their own group called the dog tribe with foxes and coyotes, and she added fox, falcon, and fairy dragon.
Also this totally sounds like something that would happen to me. Procrastinating and getting caught.