List four main characters and explain their significance to the novel A Wrinkle in Time as a whole.

Meg
Meg is the central character in the novel, and we see the action through her eyes. She is important to the novel because she, along with Calvin and Charles Wallace, is chosen to go to the planet Camazotz and rescue her father. Her importance increases when she has to travel back to Camazotz alone to save Charles Wallace from IT.
Mrs. Whatsit
Mrs. Whatsit is one of the spirit beings that comes to Earth in human form to bring the children to Camazotz to save their father. Although she presents as a ditzy old lady in too many scarves, she is actually a being of great love, wisdom, and strength who is important as a guide to and protector of the children.
Charles Wallace
Meg's younger brother, Charles Wallace, is important to the story because he has a special intuitive power that allows him to understand the spiritual realm of Mrs. Whatsit, Mrs. Which, and Mrs. Who in a way that Meg cannot. He is very important in bringing together Mrs. Whatsit, Mrs. Which, and Mrs. Who with humans, such as Meg and his mother.
Calvin O'Keefe
Calvin is a neighborhood teenager who is brought into the adventure. He is important because he offers Meg emotional support. He is well-balanced and steady, which makes him a good companion on the trip to Camazotz.