Who is heather? Identify her "plan" and explain Melinda's reaction.

Heather is Melinda’s first friend in the ninth grade. Heather has just moved from Ohio and like Melinda, does not have any friends when she begins high school. Heather is self-absorbed and obsessed with integrating herself into the social scene. Her plan is to join a clan/clique known as “the Marthas” but does not fit in well. She becomes the leaders’ minion, not their friend. She dumps Melinda as a friend because she believes Melinda is hurting her social reputation.