Who is Mr. Webster B. Willow from The Mostly True Adventures of Homer P. Figg and what is their importance?

Mr. Webster B. Willow is a newly ordained minister. Mr. Brewster has promised to help Mr. Willow find a congregation, and Mr. Willow believes that Mr. Brewster's request that Mr. Willow escort Homer to find his brother is a test. Mr. Willow wants to do well, but he is a naive young man who is unable to deal with the chaos of a big city. Not only this, but when a pretty woman targets Mr. Willow in a con to steal his money, Mr. Willow falls for it, despite Homer's protests. Mr. Willow ends up penniless and in the army in the hopes of righting his wrongs.