He embodies typical Victorian values threatens to Hyde to "make his name stink from one end of London to the other" showing the importance of reputation within Victorian society
He doesn't like to gossip because it can negatively affect a person's reputation. He is ashamed of his "long tongue" after he tells Utterson about Hyde
Dual nature of man
Utterson and Enfield are different, links to Jekyll and Hyde and the idea that differences can be brought together
Reputation
Hints that Enfield has an immoral side "about 3o'clock of a black winter morning" questions the actions of Enfield and what he is doing, however because of his highly respected reputation it is not judged unlike Hyde