Okay, so here's the games and the girls. Not all of them are listed, so feel free to add more.
Please, PLEASE help this story grow by making additions.
Shadow Dragon: Minerva, Caeda, Tiki, Linde, Pegasus Sisters
Gaiden/Shadows of Valentia: Celica, Mae, Mathilda, Clair, Emma, Faye, Genny, Sophia, Yuzu, etc
Mystery of the Emblem: F!Kris, Katerina, etc
Geneology of the Holy War/Thracia 776: Julia, Deirdre, etc
Binding Blade: Lilina, Sophia, Fa, Gwynevere
Blazing Sword: Lyn, Florina, Ninian, Serra, Rebecca, Nino
Sacred Stones: Eirika, L'Arachel, Tana
Path of Radiance: Mist, Elincia, Titania, Mia
Radiant Dawn: Michiah, Marcia, Laura, Meg
Awakening: Tons; Sumia, F!Robin, Cordelia, Severa, Nowi, Nah, Cherche, Lissa, Maribelle, etc
Fates: Tons; F!Corrin, Azura, Sakura, Elise, Camilla, Hinoka, Velouria, Selkie, etc.
Three Houses: A metric ton; Edelgard, Rhea, Lysithea, Dorothea,
Hilda, Sothis, F!Byleth, etc
Three Hopes: F!Shez, Monica, Three Hopes iterations of the Three Houses cast
Engage: F!Alear, Celine, Lumera, Vayle, Timerra, Ivy, Hortensia, etc