by Crescent Pulsar R » Thu Dec 08, 2011 2:04 am
She was angry at Genma after her family learned about the curses (and Jusenkyo). She also looked a little upset when she and Nabiki were chasing Ranma, because he had no clothes to wear and she didn't want to wear any girls' clothing. There was that time when she was angry at her father, when they learned about their engagement to Picolet Chardin.
That's what I remember off the top of my head, from the manga.