Who is Timmy Towgate from Ella Minnow Pea: A Progressively Lipogrammatic Epistolary Fable and what is their importance?

Timmy Towgate is one of Mittie's students. He tells his parents about Mittie's misspeak, and in turn, his parents inform the school board. Mittie is deeply ashamed, and Tassie is worries about her.