They‘d have a long engagement all things considered, but it would be in less than a year. Their friends find out about it long before it becomes public though.

Alois, Seteth, and Flayn are 100% guests at the wedding besides the Blue Lions. If others were recruited then yes too. Rhea as well.

They would probably spend the day quietly together or amongst friends, looking forward to the future while paying respects to those who had lost their lives.

Publicly, it might turn into an important event in the Fódlan calendar. Privately, there would be a sense of sadness (the deaths of so many loved ones, including Rodrigue and Edelgard who were like family to Dimitri) but also hope since it led to the end of a long war.

Awww, they look adorable! I love them!!!!🥺🥹💙💚