in which his sister told him he was an uncle. Mrs. Robertson is a Lakewood Elementary School Kindergarten teacher who is now retired. Her retirement diorama risked exposing Brain's secret that he was held back in kindergarten. Mr. Sanders is the building superintendent who works for the apartment building where the Frensky family lives. Mrs. Shmigaedy is one of Arthur's old babysitters, a moose who makes great cookies but is rather clumsy because of her large horns. Susy Sipple (voiced by Mark Camacho) is Arthur's next-door neighbor from Seasons 1–6, who enjoys grilling fish late at night and comes from a place where making faces on a bike means "bring me a cabbage". When he first appears, he was mowing his lawn and almost killed Toady Wartface. His name is revealed when D.W. learns to ride a bicycle. He moves out of the neighborhood in Season 6, and the Molinas move into his home. Dr. Sozio is the Read family dentist. A running gag involves parents forbidding children from putting their hands in his "mouth" (a plastic model displaying teeth). He is a bear and wears glasses. Miss Sweetwater is another third-grade teacher at Lakewood Elementary School. She does fun things with her students like singing songs (especially "I Like Fudge") while playing her guitar. In the early Arthur books, she was depicted as a cat, but in later books and the cartoon she was a rabbit. Mrs. Terracini is a grandmother to one of the children in D.W.'s class. She is very old and can neither see nor remember names very well, as she called the "Tibble Twins" the "Toggle Twins". Mrs. Tibble is the grandmother of Tommy and Timmy Tibble. She lives with the twins and has gray hair tied in a high bun. In early Arthur books, Mrs. Tibble is a human; however, many newer books and the cartoon depict her as a bear. Miss Tingley is Principal Haney's secretary and the assistant principal of Lakewood Elementary School. One time she was afraid of Miss Sweetwater's singing and Mr. Haney's sawing-in-half magic trick. She is an excellent public speaker compared to Mr. Haney, and sometimes rephrases and concludes his long, confusing speeches. In Season 20, she becomes the temporary principal after Mr. Haney resigned. Mrs. Tremello is a past substitute teacher of Mr. Ratburn's class. She was disliked by the class because she mumbled everything she said.