Who is Mike Fink from Red Prophet and what is their importance?

Mike is a river rat, who is originally hired by Hooch to act as his pole boy for his whisky run to Carthage City. Mike is for hire however, and when General Harrison offers him money to eliminate Hooch should he show himself, Mike has no trouble complying. He kills Hooch after Hooch sets fire to the Governor's home and then the fort as it spread, and worked as Harrison's goon for some time.