Claudia Furschtein and Sophie
Claudia Furschtein is one of the main antagonists in the 1987 film The Chipmunk Adventure, along with her older brother Klaus. She is very attached to her dog, Sophie, and takes her everywhere. The Furschteins run an international diamond smuggling ring. Upon hearing the Chipmunks and the Chipettes arguing about who would win a race around the world, Claudia and Klaus arrange a hot-air balloon race for them, tricking them into unknowingly aiding the illegal delivery of diamonds to various locations around the world. She has a butler, Mario, who turns out to be a spy for Inspector Jamal. She and Klaus are taken into custody by Jamal at the end of the movie.
Claudia Furshtein is voiced by Susan Tyrrell.