Who are the characters in the mostly true story of Jack?

In "The Mostly True Story of Jack" by Kelly Barnhill, the main character is Jack, a boy who feels out of place in his world. Other significant characters include his mother, who struggles with her own challenges, and the mysterious, magical beings that influence Jack's journey. The story also features a cast of quirky townsfolk who add depth to Jack's experiences and adventures. Together, they navigate themes of identity, belonging, and the power of imagination.