I can't say anything for which Emblems I'd give to characters yet, but I do have a general idea of who I want to use as a main team. I will definitely give all the royals a go, but I do have my faves. I typically end up using every unit at some point.
Alear (F) - While I like both designs, I want to play as my own gender first. Might give her Marth. Dunno yet.
Alfred - I LOVE his design. As someone who has studied historical clothing (and history in general) in extensive detail, some of the actually accurate things in his outfit that are from the 1500s, 1600s, and 1700s make me very happy. The ruff, the poufy Renaissance and Early Baroque breeches, the stockings, the heeled shoes... Yes. I would nitpick his "cravat" (actually looks more like a jabot, a completely different type of neckwear) but costumes usually get that wrong. As far as I can tell, only M!Alear has an accurate cravat. Will see in game if there are more because some of the portraits and artwork make it hard to tell.
Celine - Princess kicking ass in a dress? Yes. Gimme.
Merrin - Great design and class concept. I don't care if Wolf Knight turns out bad for some reason.
Amber - Hot man? Check. Calvary? Check. Spear user? Check.
Ivy - FLYING MAGE. Also heard she's voiced by Rhea's VA. YESSSSS.
Vander - Jagen, badass paladin, cool old man.
Clanne - Early mage, nice design.
Framme - A healer that can punch people!? Gimme.
Pandreo - Healer. Hot priest.
Panette - Berserker lady? OOOO.
Seadall - Male dancer? Hell yeah.
Rosado - I like dragon riders, okay? Flying units are fun.
Chloe - Another flying unit 🙂
Etie - Need someone to shoot fliers. Also cute design.
Alcryst - Archer Prince, need I say more? I liked Takumi in Fates Revelation and Birthright.
Fogado - Cool design and another archer I can kill stuff with.