Jacob Kowalski is a character from the "Fantastic Beasts" film series, which is part of the larger Harry Potter universe created by J.K. Rowling. He is portrayed by actor Dan Fogler and is a No-Maj, which is the American term for a Muggle, meaning he is a non-magical person. Jacob is known for his kind-hearted nature and his desire to help his friends, particularly Newt Scamander. In the films, Jacob becomes involved in the magical world after encountering Newt and his magical creatures. He works in a bakery and dreams of opening his own pastry shop. Throughout the series, Jacob's loyalty and bravery shine as he navigates the challenges of a world filled with wizards and magical beings.