Jake

Jake (full title: Jake the Dog), the second protagonist of Adventure Time, is a magical dog and Finn's constant companion, best friend, and adoptive brother. Jake has Stretchy Powers, which allow him to stretch and manipulate his body, coming in handy on innumerable occasions throughout his and Finn's adventures. He is the son of Joshua and Margaret. Jake has a brother named Jermaine. Jake is 28 in magical dog years, but he rarely acts maturely. He is around 14 in human years. Both he and his girlfriend, Lady Rainicorn, share a passion for playing the viola.