Dr. Henry Jekyll - doctor and friend of both Lanyon and Utterson. Jekyll is a prosperous man, well liked in his community, and famous for his morals and charity works. However, he secretly engages in a strange behavior. Jekyll thinks that his evil side is a burden and conducts experiments to separate his good and evil selves from each other. However, during these experiments he brings Mr. Hyde into existence. He makes a mistake and transforms himself so he fully becomes his darker half.
Mr. Edward Hyde - man who looks almost non-human. Hyde is violent and cruel, and the people who see him say he is very ugly and deformed but no one can say exactly why he looks this way. Hyde is Jekyll’s evil side, released from Jekyll's mind into the world by a potion.
Mr. Utterson - A well respected lawyer. Utterson is reserved and confident, but also is curious about the situation with Jekyll. He doesn't seem to believe in the supernatural. He is definitely a more rational thinker who's curiosity gets the best of him when he digs deep into Jekyll's affairs
Dr. Lanyon - A doctor. Also one of Jekyll’s closest friends. Lanyon the most rational and skepticial man in the story. Jekyll, who embraces mysticism. His death represents the more general victory of supernaturalism over materialism in Dr. Jekyll and Mr. Hyde.
Mr. Poole - Jekyll’s butler. He is a servant, having worked for the doctor for twenty years, and his concern for his master after all the weird stuff thats been going on eventually drives him to seek Utterson’s help when he becomes convinced that something has happened to Jekyll.
Mr. Enfield - A distant cousin and friend of Mr. Utterson. Like Utterson, Enfield is reserved. Enfield and utterson often walk together for a while without saying a word to one another.