Answer in brief Ki

Bright, pretty, and politically radical, Petra is initially a schoolteacher until her father's scandal causes her to lose her job. She supports him and his cause wholeheartedly, demonstrating modern attitudes, keenness of intellect and wit, and a burning desire for the truth. Stockmann's wife, Catherine is mild-mannered at the beginning of the play, and worries about what Stockmann's findings might mean for her family. However, as the play goes on she becomes more outspoken and stays by her husband's side.