Alright, I will wait to give more detailed builds for when you know who you are pairing with who in terms of second gen guys. However, here are some notes
Gregor/Nowi leads to a pretty decent Tank Nah, with the added bonus of also getting dual support + along with Deliverer.
Henry/Olivia = broken sorcerer build thing that you are running on Laurent in your main file. Also, get Galeforce on Olivia before you recruit Inigo so he can inherit it
Loq'ue/Lissa is not amazing for Owain, but not aweful either. He will probably take support duty. Make sure to get Galeforce on Lissa so he can inherit it.
Frederick/Cordelia. Freddybear is basically an super good father for any physical focused kid, so good here. Nothing really gender specific to worry about inhereting
Donnel/Miriel leads to either a fairly decent Sorcerer tank, or support build. Have him inherit Dual Support + just in case you go for the later.
For Cynthia, you literally build her the same as Lucina, minus Rightful King or Dual Strike. Replace those with another tanking ability or Tomefaire.
I will note all of these.
As for supports, for the Robcina run, leaning towards Morgan with Inigo, Brady, or Gerome, Owain or Brady with Severa, Gerome with Cynthia if I don't put him with Morgan, and not sure on the rest. Probably Nah and Yarne together, now that I think about it.
On my Yarne run, the pairings are (most of which I haven't completed yet) Yarne/Robin, Freddy Bear/Sumia, Ricken/Lissa, Gaius/Tharja, Chrom/Olivia, Donnel/Nowi, Lon'qu/Miriel, Vaike/Panne, Kellam/Sully, Stahl/Cordelia, Libra/Maribelle, and Gregor/Cherche. Still debating on second gen pairings outside of Robin/Yarne and Morgan/Lucina.
And I'll note your Nah ideas as well. Tank idea tempts me more, but a balanced Morgan could be nice.
I'm with you on this one Robertman2
I am sorry for ruining everything. I will try and track down fluff as consolation.
Anyway, I came to mention a Streetpass that amused me today. It was a female Robin I THINK paired with Lon'qu (haven't fought her yet, though), but she has some of the best weapon names I've ever seen.
-Robin has a tome called "<Robin's name>'s Fanfiction."
-A Bolganone called Bologna.
-All of Chrom's weapons are named after his family (Sumia, Lucina, Cynthia).
-Lon'qu's weapons combined is "I LOVE WOMEN."
-Cordelia has a weapon named "Chrom Nom."
Tharja's tomes are a Tharja/Robin fanfic and an R-Rated fanfic.
-Olivia has a sword named "Twerk It."
-Cynthia has a Spear named "My Rage."
I wish I could come up with clever names for my weapons.
EDIT: And Chrom just Aether'd me with a Stick. I am crying from laughter. The sight of Chrom dramatically using Aether at sunset with a Stick is truly a gift.