Show us, don’t tell us, what’s going on and why. Don’t write ‘She was loud and rude’ but “Get outa my way, you jerk!’ she bellowed.
Is the character interested by what’s going on? Keep her active – no sitting around, doing nothing as she might walk off stage. Where does she go? Round out the character by showing complex psychology and emotions such as fear, frustration, anger, rage and envy.