Madame Morrible.
No character of that name exists in the musical. That character may be in the novel, "Wicked: The Life and Times of the Wicked Witch of the West" by Gregory Maguire, but not in the Broadway musical.
A woman in charge of a school is typically referred to as a principal or headmistress.
It is a book and a Broadway show, it has not been made into a movie yet, but the name is Wicked.
headmistress
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If you are referring to the Broadway show Wicked and are inquiring about the actress that originated the role of Galinda/Glinda, her name is Kristin Chenowith.
Madam Morrible
Lizze Broadway's birth name is Elizabeth Broadway.
A woman who is in charge of a school is typically referred to as a "principal" or "headmistress." In some educational settings, she may also hold titles such as "head of school" or "school director." These roles involve overseeing the administration, curriculum, and overall management of the school.
Ron Broadway's birth name is Ronald Rex Broadway.
Miss Trunchbull ________ Agatha Trunchbull played by Pam Ferris