>>23543563She never antagonized anyone her, catchphrase aimed at Ash was more of a joke than anything. She was such a bro to Ash she went and put on a show at his 8th gym just to cheer for him when he was close to giving up. They were always swinging on vines and going crazy over food together.
She was just a deadpan snarker, a tsukkomi-type character. We can tell from a lot of episodes and scenes she does care for Ash and Cilan a good deal. I don't remember her ever seriously tbeing an ass to Cilan/Ash just for no reason.