Gustav

  Muppeteer :   Andrea Bongers 

 Design Team: Ed Christie • ( designer ) Paul Hartis • ( builder )  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 .