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

Amos is Ella's father. He makes his living creating liquor jugs and other ceramic vessels. A recovering alcoholic, Amos finds the stress of the situation in Nollop to be unbearable, which leads him to begin drinking again. He is banished from Nollop after committing three offenses.