What is mr.utterson's relationship to mr.enfield?

Mr. Utterson and Mr. Enfield are friends and acquaintances in "Strange Case of Dr Jekyll and Mr Hyde." They often take walks together, during which Enfield recounts stories from his experiences, including the infamous incident involving Mr. Hyde. Their relationship reflects a shared social circle in Victorian London, with Utterson being more introspective and reserved, while Enfield is more outgoing and adventurous in his storytelling.