FE2: Witches including two of Judas daughters Maria and Heste
FE4:There's also Lamia a cruel assassin, Vampa and several others. Female come in generic enemies too.
FE5:Only the Dark warlords. Generic enemy units can be female(not just female only classes like Pegasus Knight).
FE6: Brunya, Sigune
FE7: Ursula, Sonia, possible Limstella
FE8:Selena
FE9:Petrine
FE10: final boss