UPDATE: I figured it out by myself. I completely forgot that a lion was Saber's mascot, because she was compared to one.
Sorry, link to the lion was bad before.
Why is that all cool nendroids come in the 100mm class? Now that I have a 50mm Miyuki, I feel like an boy with a 9mm railroad when all his friends have H0 sets.
UPDATE: DiGiKerot says that Saber Lion is from a game.