Maybe it was because of her experience hunting with just a dull dagger or just because she is a genius her fighting style became more graceful and her attacks became more precise.
Before she was a bit clumsy but now she looks like an experienced swordsman she might not be as good as those that have been fighting for years but at least she is better than novice.
Not to mention she uses her long legs and flexible body which was able to move in an exaggerated manner to use, whenever the monkeys tried to corner her she would use her legs to kick one of them and twist her body to dodge the incoming attack.
While she was having an easy time Green wasn't, it had been hit by numerous times by stones and sticks of course it was hurt but it was still able to heavily injure the monkey chief.
It didn't know why but every time he was hit it didn't felt that much pain and on the contrary it felt energized as if something inside him was telling it to go wild.