STARTING WITH A BANGER I SEE HRRRRGGHHH
okay i have very many emotions about the emblian royals Always but i will try and gather my thoughts into cohesion that you all may appreciate the tragic beauty that is veronica and her siblings.
for one, i see embla as a very isolationist nation; very much a dog-eat-dog type beat, where people rarely trust but do so fiercely, when it does happen (assuming they don't end up backstabbing each other in pursuit of survival but erm..!!! we will dive into that sometime else)
bottom line is: i think family is the only thing veronica ever really trusts, and that letizia and bruno are the only people she considers to be family. i mean, who else would she feasibly rely on? we see that the political landscape of embla is rocky and brutal; they would discard her without second thought if they found no more use for her. realistically, she would never rely on them. but her siblings? well, they're family, aren't they? isn't their bond with each other the only thing they all really have? we see how she places full faith in letizia, unable to believe her betrayal even when it happens right in front of her. we see how much she values bruno and his support— even going so far as to despair his constant journeying, worried that he hates her. based on all this, we can assume that she cherishes her siblings a great deal.
we also see that she's grown a lot thanks to her siblings. with regards to bruno specifically, we see her warm up to the askrans thanks to his influence; in the dragalia lost collab (because that shit is REAL to me, damn it!) she cites bruno teaching her to keep promises as the reason why she's able to fight back her curse-prompted urges. she goes against instinct and learned behavior for them. come on, she is fully willing to discard political status when speaking with letizia; like that must be huge for someone whose life must have been heavily politicized since the start!!!
it makes their ultimate deaths all the more tragic, then. letizia and bruno both sacrifice themselves for veronica's sake, though letizia's seems more spiteful at a glance— either way, they prove that they are worthy of veronica's trust with their lives. and it's a tremendous loss for veronica because she just lost two people who she arguably felt loved her the truest, with no conditions attached.
so fricking sad!!!! ugh!!!! i need that happy ending au where letizia and bruno both live and they can all be a happy family again. too bad feh hates sibling trios (coughs at book 5)
EDIT: I JUST REALIZED THIS IS LESS HEADCANONS ABOUT THEM AND MORE JUST A LONG ASS DUMP ABOUT MY THOUGHTS ERMMMM for actual headcanons! my favorite headcanon is that bruno used to brew veronica tea on nights she couldn't sleep, during that brief time in their childhood where he still lived in embla. and that, once he's exiled, veronica eventually learns to brew tea herself in pursuit of recreating that taste. boom.