Luke is a glasses-wearing mouse who attends Mouse School with Tutter. In "Tutter's First Big Sleepover Bash," Luke attended his very first sleepover, but may not have been quite ready. He missed his parents and needed a drink of water, a lullaby, a special pillow and a vaporizer and he likes Tutter but he also appears in a Bear in the Big Blue House episode called "A Strange Bird".