Mr. Guest
Mr. Utterson's law office clerk who discovers the handwriting similarity between notes from Mr. Hyde and Dr. Jekyll.
Richard Poole
Dr. Jekyll's faithful butler. When fearful for his master's life, Poole seeks out Mr. Utterson's assistance. The two men discover Edward Hyde dead in Dr. Jekyll's cabinet and then, from a letter written by Dr. Jekyll's hand, learn of the doctor's fantastic experiments.