Diana Hyde

Diana is the child of Edward Hyde and sister to Mary. Though, her sister Mary was fathered by the more respectable Doctor Jekyll. This allowed Mary to grow up in a more respectable area, with a more well off family and care given to her. Diana, was cast off early and raised on the harsh streets of London, eventually being taken in by the Saint Mary Magdlen orphanage for lost girls. She has a rough and gruff childhood, leading her to being rather rough around the edges uncouth, brash and often quite 'unladylike'. Diana, despite this, loves her sister, and her new found family at 11 Park. Reuniting with her sister may have been one thing for her, but doing so under the fact that they both were fathered by two sides of the same man was unique enough situation to create a bond between them.

Book II:

Diana here flexes her abilities and hone her craft of lock picking and stealth. While Mary fancies herself somewhat of a detective and trying to be more like Irene Norton and Holms, Diana has leaned into her skills and physical stature to make slipping into places, and picking locks her forte`. She uses this in a climatic way to sneak into and break out Lucinda Van Helsing ( of course with Dr. Freud's help).