Gustav



 Gustav  is a caterpillar character from Sesamstrasse, the German co-production of Sesame Street. Gustav is Rumpel  's  pet  caterpillar who also lives in  his   rain barrel. He is the only character to this day to whom Rumpel  shows  his  soft - natured side.

Gustav doesn't speak & was added to the Sesamstrasse cast in the 2000s. He was based on Oscar the Grouch  's  pet   worm   Slimey.