Merle " Mouse " Ellis

Mous Ellis is Sheila Tubman 's same aged best friend in Tarrytown in "Otherwise Known as Sheila the Great". She is the junior champion of Tarrytown who is a yo-yo expert. She is also a dog lover even though she doesn't have any dogs since her four year old sister Betsy is allergic to dogs. Instead Betsy has a fake dog which is a empty candy box named Ootch. She is a awesome swimmer. She and Sheila have lots of fun together. Sometimes Sheila has a hard time admitting to Mouse that she is scared of stuff. She and Mouse are friends with the Van Arden twins Sondra and Jane. They all have a sleep over and get a little wild when they play a game called "slam book ". In "Fudge a Mania", Sheila says that Mouse can turn cartwheels and that she is going to visit Sheila soon. Later Sheila gets extremely upset when she finds out that Mouse has chicken pox and can't come to Maine.