He is a shapeshifter or "werewolf" of the Quileute tribe, former Beta of the Uley pack, and Alpha of his own. In Twilight, he is fifteen years old, and in New Moon, he phases into a wolf for the first time at the age of sixteen. In Breaking Dawn, he imprints on the hybrid baby named Renesmee Cullen, the daughter of Edward Cullen and Bella Cullen. Generally, Jacob is very friendly, playful, carefree and caring towards the people around him. He would go to any extent to protect those he loves most. Like everyone else in his tribe, he had a prejudice against the Cullens and other vampires, viewing them as nothing more than blood-sucking monsters, but eventually warmed up to the Cullens and came to see them as something more than vampires.