Jake the dog is the main character on Adventure Time. He is Finn's brother, companion, and best friend.
He is a gold bulldog with white eyes and black irises, he also has a black nose and a very small tail.
Jake, in one word is described as lazy. He likes to sit around and tease Finn about his [Finn's] crush on Princess Bubblegum. He can sometimes be evil as shown in "Apple Theif" (steal old lady's purses).