Grandson of Abe Portman who discovers he is a Peculiar with the ability to see invisible Hollowgasts. His journey leads him to uncover his grandfather's secrets, enter a 1943 time loop, and protect the peculiar children. He fights Mr. Barron, saves Miss Peregrine, and ultimately learns to navigate time loops to reunite with his friends and rewrite his grandfather's fate.
Jacob develops feelings for Emma, a peculiar girl who controls fire
Headmistress who guides Jacob and protects the peculiar children
Leader of the hollowgasts who hunts peculiar children for their eyes