Jacob Black is a fictional character from the Twilight series, created by author Stephenie Meyer. He is a member of the Quileute tribe and has the ability to transform into a wolf. Jacob is known for his strong loyalty to his friends and family, particularly to Bella Swan, the series' main character. Throughout the series, Jacob develops a close bond with Bella, often serving as a protector. He is portrayed as a passionate and sometimes impulsive character, struggling with his feelings for Bella and his rivalry with Edward Cullen, a vampire. Jacob's journey explores themes of friendship, love, and identity.