In the end
- Bernadetta
Hubert (seriously)
- Dorothea
Ferdinand (totally forgot this happened)
- Byleth
Edelgard
Shamir, Felix etc. all became killers/loners/incels.
Ignatz a painter, Mercedes runs an orphanage.
Petra went to back to Brigid an experienced ruler
Ingrid took over a nice piece of land
Edie made Casper her minister of military affairs
Saddest was Lysethia, she just vanished into obscurity.
Also pretty shitty from Nintendo to not give Koei Tecmo much credit prior to release for developing basically the entire game.