Jacob Kowalski is a central character in the 'Fantastic Beasts' film series, set in the Wizarding World of Harry Potter. As a non-magical person, or 'No-Maj', Jacob becomes an unlikely ally to the wizard Newt Scamander after a chance encounter. He is characterized by his warm heart, optimistic nature, and comedic disposition. Despite lacking magical abilities, Jacob's bravery and loyalty make him an invaluable companion. His dream of owning a bakery reflects his down-to-earth personality and provides a grounding presence amidst the magical chaos surrounding him.