Caspar and Ashe married in their paired ending. You don't just spend your entire life with someone who's just a friend and have them constantly at your side.
Gordin x Kris is canon IS are just cowards
The Gordin we have in FEH is a fake, the original one is much more manly and hot and NOT A SHOTA. It's a Navarre Samto situation I tell you!
IS fucking despises Gordin
Claude ended up bringing one of the stray cats from the monestary with him to Almyra to remember everyone.
Even if Yuri and Ashe have no supports in 3H, they're actually really close. (They even have battle dialogue against each other!!!!)
Azura probably atvl has a surpressed crush on corn in birthright. I mean as she lays dying she ends up reaching out to him and asking HIM to smile, not her potential spouse or child. Thus I believe Azura actually was in love with Corn but since corn is married to someone else already, she repressed her feelings but was never able to quite let go of them.