[She can understand that; this Fenris sounded a lot like Laxus.]

You don't like shoes?

I'm sure your friends are grateful for your help. Even a rock that misses it's target can still serve as a distraction.

[Although Erza would probably scold Merrill if she missed a crucial shot in a fight or during training but there was something endearing about her. She also seemed very fond of her friends which scores her bonus points with Erza.]