They were not related as such, rather technically the same person. Almost a case of split personality, although the change was caused by a tonic of sorts which could be voluntarily ingested to initiate the change.
In the story of the "Strange case of Dr. Jekyll and Mr. Hyde," Dr. Jekyll turns into Mr. Hyde and visa versa. The story is associated with dissociative identity disorder where Dr. Jekyll represents the good in Dr. Jekyll and Mr. Hyde represents the evil side in Dr, Jekyll.
The girl who was trampled in "Dr. Jekyll and Mr. Hyde" was going to deliver a message for Mr. Hyde, the evil alter ego of Dr. Jekyll. She was seeking to deliver a note to Dr. Jekyll's residence.
The troglodyte in the novella Strange Case of Dr Jekyll and Mr. Hyde is C) Mr. Hyde. He is the alter ego of Dr. Jekyll, representing the dark and immoral side of his character.
Mr. Hyde plays the role of Dr. Jekyll's darker, more sinister alter ego in "The Strange Case of Dr. Jekyll and Mr. Hyde." He represents the hidden, evil side of Dr. Jekyll's personality that emerges when he takes a potion to transform into Mr. Hyde.
The book "Dr. Jekyll and Mr. Hyde" is narrated by Mr. Utterson, a lawyer and friend of Dr. Jekyll. Throughout the novel, Mr. Utterson investigates the mysterious and disturbing behavior of Mr. Hyde, leading to the unraveling of the connection between Dr. Jekyll and Mr. Hyde.
The surgical theater in "Dr. Jekyll and Mr. Hyde" is called the dissecting room. It is where Dr. Jekyll performs experiments and transformations that lead to the creation of Mr. Hyde.
Dr. Jekyll's nickname was Mr. Hyde.
Mr. Hyde
Dr Lanyon discovered that Mr Hyde was a metamorphosis of Dr Jekyll. Lanyon saw Mr Hyde drink a potion and metamorphose into Dr Jekyll.
Mister Hyde is Dr. Jekyll minus all his goodness. Dr. Jekyll was a big man, of noble stature. Mr. Hyde was short and hunched.
"Dr. Jekyll and Mr. Hyde" was written by Robert Louis Stevenson in 1886.
He isn't given the choice. He want to become Dr. Jekyll perminantly but keeps reverting to Hyde.