These waifus are:
Yukino, Yui, and Iroha
And from my own personal choices, Shizuka-sensei and Yui's Mother
from Oregairu.
But before the battle starts, let's see who won the previous battle.
And the winner for Fate Series' best girl is...
Rin!!!
This was a close match. It seems that most of our new voters from OT didn't know both of them, so they voted purely based on their looks, and it seems that Rin has won the beauty competition! Maybe voters liked the relaxed look of Rin more than saber's more serious look perhaps?
Advancing to the front lines, she moves on!
Now let's continue.
VS
May you choose wisely.