Suzy Johnson (voiced by Kari Wahlgren) is a recurring villain of 2007 Disney Channel television series Phineas and Ferb series and also one of the secondary villains in 2009 Japanese anime slasher film Alvin and the Chipmunks: Deliver Him From Evil. She is Jeremy Johnson's younger sister, the youngest granddaughter of Hildegard Johnson (Vicki Lawrence), and also the youngest daughter of Mr. Johnson and Mrs. Johnson (Jane Lynch).