1. Inspiration and writing

2. Characters Gabriel John Utterson
Gabriel John Utterson, a lawyer and close loyal friend of Jekyll and Lanyon for many years, is the protagonist of the story. Utterson is measured and at all times emotionless bachelor – who nonetheless seems believable, trustworthy, tolerant of the faults of others, and indeed genuinely likeable. However, Utterson is not immune to guilt, as, while he is quick to investigate and judge the faults of others even for the benefit of his friends, Stevenson states that "he was humbled to the dust by the many ill things he had done". Whatever these "ill things" may be, he does not partake in gossip or other views of the upper class out of respect for his fellow man. Often the last remaining friend of the downfallen, he finds an interest in others' downfalls, which creates a spark of interest not only in Jekyll but also regarding Hyde. He concludes that human downfall results from indulging oneself in topics of interest. As a result of this line of reasoning, he lives life as a recluse and "dampens his taste for the finer items of life". Utterson concludes that Jekyll lives life as he wishes by enjoying his occupation.
Dr. Jekyll and Mr. Hyde (character)
Dr. Jekyll is a "large, well-made, smooth-faced man of fifty with something of a slyish cast", who occasionally feels he is battling between the good and evil within himself, leading to the struggle between his dual personalities of Henry Jekyll and Edward Hyde. He has spent a great part of his life trying to repress evil urges that were not fitting for a man of his stature. He creates a serum, or potion, in an attempt to separate this hidden evil from his personality. In doing so, Jekyll transformed into the smaller, younger, cruel, remorseless, and evil Hyde. Jekyll has many friends and an amiable personality, but like Hyde, he becomes mysterious and violent. As time goes by, Hyde grows in power. After taking the potion repeatedly, he no longer relies upon it to unleash his inner demon, i.e., his alter ego. Eventually, Hyde grows so strong that Jekyll becomes reliant on the potion to remain conscious throughout the book.
Richard Enfield
Richard Enfield is Utterson's cousin and is a well-known "man about town". He first sees Hyde at about three in the morning in an episode that is well documented as Hyde is running over a little girl. He is the person who mentions to Utterson the actual personality of Jekyll's friend, Hyde. Enfield witnessed Hyde recklessly running over a little girl in the street and the group of witnesses, with the girl's parents and other residents, force Hyde into writing a cheque for the girl's family. Enfield discovers that Jekyll signed the cheque, which is genuine. He says that Hyde is disgusting-looking but finds himself stumped when asked to describe the man.