Who is Nest Freemark from Running with the Demon and what is their importance?

Nest Freemark is a teenage girl who lives in Hopewell, Illinois, with her grandmother, Evelyn, and her grandfather, Old Bob. She is the custodian of the Sinnissippi park, located near her home. The women of her family have been guardians of the park for many years, in service to the Word, the force of good in the world.