I will join you in this fight since I ship Stahl and Sumia HARD. (Would have been such a cute family)
Anyways, Headcanon and stuff time
-The Avatar is ambidexterous, but primarily left handed.
-Gaius and Anna have a sort of 'Friends with benifits' relationship that they keep under wraps due to their respected classes.
-Gaius has many other nicknames for those in the army, but has been told not to use them due to some being quite inappropriate.
-Nowi is the shortest in the army; even shorter than Ricken. Frederick is the Tallest, with Tiki being a very close second.
-If pairing Olivia with Chrom, Lucina was concieved on the battlefield. (Making the wedding very soon after)
-Donnel and Kellam consider each other family and hang out all of the time.
-Virion seems to make the most sence as Inigo's father and also makes me laugh.
-Chrom is Red/Green Colorblind, which is why he couldn't tell the Avatars clothes are Plegian, but could tell that Henry's were. (The colors stand out more on Henry's and are very pronounced while the Avatars would blend and be hard to see.)
-Lucina also has a mild form of colorblindness.
-Severa has a daddy kink. (I normally hate this kink; but for some reason I don't mind it at all with Severa.)
-If Sumia and Stahl could get together, Cynthia's Pegasus would be the foal of her parent's mounts.
-The reason Severa doesn't want to become a Pegasus Knight like her mother is not just out of Spite. She is also extreamly afraid of Heights. (Though she won't admit it.)
-Sumia is a decendant of Florina.
Awakening things I do/feel
-If I am playing as MaMU I will always marry either Nowi or Panne because I like giving their children a sibling; especially in the case of Panne.
-I think Inigo is actually a very loving Husband and is one of only two Second gen characters I feel truely comfortable making my spouce. (The other is Yarne.)
-I feel that Sumia should have been able to marry Stahl. I think Stahl would be an amazing father for Cynthia.
-If it weren't for how sad some of the 'alone' endings are, I would be pairing units that can't S-Rank or Support together far more often.
-I always wait until level 20/30 before promoting or changing a characters class.
-I will Always reclass Olivia as an assassin at least once because holy shit she's a moe murder machine.
-While I see Virion as Inigo's Canon father, I prefer Lon'Qu as his dad.
-The Avatar is Albino and near blind. They have exceptional hearing and use sound and vibrations in the ground to find their way.
-This is also the reason they 'pet' their units faces; so they can see those close to them better.
-Flannel and Nishiki enjoy petplay, but Flannel enjoys it more.
-Pieri seems like she would be into some really dark stuff, but is actually the sweetest, most vanilla person when it comes to love.
-Camilla is a Red wine type of gal and has a pretty high alchohol tolerence. In contrast, Hinoka is a lightweight and only likes very sweet wines. (Plum Sake is her favorite.)
That's all I can think of for now. Might add more later.