Cady, Regina, Gretchen and Karen.
Cady is the new girl in high school, Regina is the most popular girl, which does not make her a good person, of course.
She starts manipulating Cady but this game turns against herself later.
Her friends help her do that but it doesn’t last long.
Regina’s friends leave her later and she becomes an outcast.
No power lasts forever, especially, if you manipulate people.