Dr Henry Jekyll.

Living in Leicester Square, west of Covent Garden, Jekyll is a kind and respected English doctor struggling with repressed evil urges. As a potential solution, he develops a serum that he believes will effectively compartmentalize his dark side. Instead, Jekyll transforms into Edward Hyde, the physical and mental manifestation of his evil personality. This process happens more regularly until Jekyll becomes unable to control when the transformations occur. Dr. Jekyll roams Soho as Mr. Hyde, and Dr. Jekyll inhabits Leicester Square as himself.