You guys got any headcanons that I could adopt? Here's some of mine

Anthony is a really big dork about the past FE games lore. Alm's story is his favorite.

When fatigued (echoes/gaiden mechanic) Lukas acts a bit like a toddler and everyone gets a kick out of it. He doesn't remember a thing from it. 

Adding to this, he has one of the purest laughs anyone's heard.

If Ike ever becomes a father, he'd be that down to earth guy who attempts to be "hip" later in his kids life but then turns out to be a really good dad. (taken from my Serenes Forest account)

Off the battlefield, Reinhardt's a dork when it comes to the younger ones (like Nino and Nowi, despite her age). Everyone says he'd be a great father because of this. 

Lucius, Seliph and Boey are done taking care of mage problems for Tiki and Reinhardt, they'd expect them to be better at it. Lukas they understand because a man with that much defense needs some weakness.

Ike once got a hold of some black tights and pink high heeled boots. Mettaton related incidents started, and everyone looks good in them.

Ryoma is tired of having all of the spiders being placed in his hair, along with the birds resting in there.

When/if Kaze comes to Heroes, he brings that pillow that he mentions in the Ghostly Gold DLC. 

SPOILER TERRITORY

Duma's bi and still kind of in the closet about it. 

The Deliverance never truly understood Fernand's betrayal, but Lukas did eventually forgive him for what happened in Act 1. 

Yeah, if I come up with more I'll post them