Who is Reverend Tweed from Hattie Big Sky and what is their importance?

Reverend Tweed runs the local church and has only a small role to play in this story. He appoints Mrs. Martin to head the church's efforts at creating a choir which Hattie hopes will be a way to get Perilee to begin coming to church and while the Reverend agrees in principle, he bows to the prejudice of Mrs. Martin and her influence.