While there’s a lot of great choices for Assassins as far as the females go as the roster is quite (short)stacked, I gotta settle with the two that have been closest to my heart.
Shuten-Douji is my favorite Assassin and among my favorite characters in FGO, period. It’s almost cheating since her seiyuu is Aoi Yuuki and, well, hearing her speak is basically sex to the ears. She has the same effect on me that Takehito Koyasu does in regards to males.
You can turn me into sake any day you please, mami.
You can even stir up my guts, too.
For my second vote, that has to go to my beloved Torture Loli. Her character is surprisingly fitting, and she’s all around enjoyable to have, plus I love her color palette and that smug as hell face. She reminds me in many ways of Chacha, who I also like a great deal for many of the same reasons. Plus, it’s always nice to have female royalty around.
I also vastly enjoyed the whole Nightless City portion of Agartha more than anything else, plus her heroics at the end were very pleasing. She has a very twisted yet interesting view of morality.
And of course, can’t forget about the loveable little Jack. Dismember Loli is probably the best Assassin in the game and for good reason. She’s cute to boot as well, despite being based on an utterly abhorrent character. I just love Fate logic <3
Gonna toss some honorable mentions to the innocent and loveable Cleopatra, as well as Kama, who is likely to become my next mommy whenever she drops.