Oscar the Grouch is a green grouch-troll and is one of the main characters on Sesame Street. He always lives up to the species he is, a grouch, who is miserable, rude and just plain grouchy.
Oscar lives in a trash can between Big Bird's nest and 123 Sesame street building. Oscar has had many pets, but his closest companion is his worm Slimey. He also has a girlfriend, a Grouch named Grundgetta although a romantic relationship between two Grouches is understandably rocky. Grundgetta usually calls him Oskie while he occasionally calls her Grungie. Telly and Elmo both consider Oscar to be a close friend, although Oscar disputes this since Telly and Elmo are the two monsters that Oscar doesn't like at all. However, Oscar reluctantly confirmed in Grouchland that Elmo was indeed his friend.