<P> During the night, Meg's younger brother Charles Wallace welcomes Mrs. Whatsit, a red - haired stranger in an extravagant white dress, into the Murry family house . Mrs. Whatsit claims that the tesseract, a type of space - travel Alex was working on, is real, and leaves soon after . The next day, one of Meg's classmates, Calvin O'Keefe, joins them to go to the house of Mrs. Who, another strange woman who speaks only in quotations and seems to know Charles Wallace . </P> <P> When Calvin joins Meg and Charles Wallace in their backyard, Mrs. Whatsit appears with Mrs. Who and another woman, Mrs. Which, who is the oldest and appears as a giant . The three reveal themselves as astral travelers, and lead Meg, Calvin, and Charles Wallace through a tesseract taking them to a distant planet named Uriel . </P> <P> Mrs. Whatsit transforms into a beautiful green flying creature, and takes the children up into the atmosphere, where they see a dark shadow known as The IT . Mrs. Which tells Meg her father's experiments resulted in his being captured by The IT, a malevolent entity plotting to take over the universe . Gaining the women's trust, Meg and the others tesser to another planet where a seer known as the Happy Medium resides . </P> <P> The Happy Medium shows them Meg's father is trapped on a planet called Camazotz, The IT's homeworld . Mrs. Which also explains that The IT represents all of the greed, anger, pride, selfishness, and low self - esteem in the world . He shows them examples of these characteristics, including a friend and neighbor of Charles Wallace getting mugged at a bus stop, her school enemy Veronica Kiley's extreme self - consciousness about her weight and her resulting dieting habits, and that Calvin, despite being popular at school, is neglected and bullied by his father . The three Mrs. propose that they travel back to Earth to regroup, but Meg's strong will to find her father overrides the tesseract, and she accidentally redirects them to Camazotz instead . </P>

Who played the mean girl in a wrinkle in time