I mean her overall style. It just does not seem fitting for Medusa at all, regardless of effect modifications.
It's too....whimsical, majestic, "holy", etc. which fits Palutena to a tee, but not Medusa's wicked and cruel nature like abilities
she's shown to have that Palutena does not.
You mention Ganondorf, though at the time that he was made into a clone, aside from the magic orbs and floating aspect in his boss bottle, having a brutal fighting style powered by dark magic was rather fitting for him considering he
didn't fight with a weapon until he transformed into Ganon and would deliver a ground-shaking fist if Link came too close without using a Light Arrow prior.