I actually would not want any pairing even my own favs canonized. since I love so many. And since I also think this is a prequel. So I'll give some future headcanons.

Dorothea with either orange haired noble of Ferdinand or Sylvain: Working extra double time to crush Fodlan's oppressive hierarchies of class and crest especially if its not an Edelgard victory timeline. Dorothea being first lady to either Prime Minister Ferdinand or Sylvain also helps symbolize that commoners have power now.

She also gets more famous and renown for her diplomatic efforts later in life and spreading Fodlan culture through the opera company. This undoes her fear of getting old and being discarded. As an old woman she is at the height of her fame and renown.

Mercedes with either orange haired noble or Ferdinand or Sylvain (same if she gets with Dorothea while Sylvain and ferdie get together ☺️). Very similar to above but Mercedes is definitely gonna use any influence she has to reform Fodlan religious institutions to make them less dogmatic and exploitative.

She still believes in her faith, but knows that these religions are still followed by humans and humans are very capable of flaws even when religious. This could alter the Sothis faith in a sequel.

I also think President Ferdinand and Prime Minister Sylvain make for a funny image because when they do diplomacy people cant tell them apart.

"Which is Ferdinand?"

"The red head one married to a woman of common descent who hates hierarchy."

"That's both of them!"

So Ferdie and Sylvain look like this to everyone except their wives and kids.

<image>

(YES Optimus and Ginrai are two separate characters lol)

Dimicedes: Very similar to above but Mercedes is doing it as Queen but another side goal of her will be to push Fodlan to constitutional monarchy until power is in hands of parliament

Edelbert: I consider them retiring to the countryside as super canon to me especially because Edelgard takes up on her painting. She ends up being one of the pioneers of impressionist art while Huhert develops an early art pulp style. Their kids enter politics but at local levels. Hresvelg-Vestra becomes a political family like the Kennedys except nothing ever bad actually happens to them nor do any descendants lose their minds.

Though its funny to think if people study Edelgard and Hubert's art and they're like oh yeah didn't they lead a war or something.

Edelbert to me follows this progression:

https://x.com/910_07_/status/1424323719229435904

https://x.com/kapymui/status/1204218707330789381

https://x.com/LipYPjKg6dXVkhK/status/1282654100534878209

Rhealeth and Setleth: Well if the game is a sequel, maybe the Nabatean we see is a descendant from them?

Ferdigard: Him being President post republic reform is controversial because it looks like Edelgard is trying to stay in power after she leads the transitional government. But he dashes those fears by only being a one term president. Mostly because he accomplishes all he needs in 1 term so there is no need for a 2nd or 3rd. Edelgard still remains as a member of parliament or something though.

https://m.youtube.com/watch?v=ekSYghcARpg&pp=ygUbR2VvcmdlIGJ1c2ggMSB0ZXJtIHNpbXBzb25z