Yivo (voiced by David Cross) is a sentient extraterrestrial being from another universe who appears in The Beast with a Billion Backs. He communicated with universe "gamma" through the space-time hole, using his tentacles, which he used initially to mate with humans. He begins a "romantic relationship" with the inhabitants of the other universe, but even after the universe agreed to move in with Yivo, Yivo 'broke up' with the universe when Fry sent a letter back through the rift to Bender, as the electromatter that it was made from was used to produce weapon against him.