Entry for the Twilight of the Vampires contest at Seventh Sanctum.
Dr. Jacqueline Hyde was a leading chronophysicist who discovered that the elusive key to surviving time travel possibly lay in the enhanced biology of Homo Nocturnus, the common vampire. Sacrificing her human life, Dr. Hyde joined the ranks of the undead and spent her restless nights perfecting the machine that had driven her to such horrible extremes. And her hypothesis proved correct as she became the first almost-person to travel through time.
Dr. Hyde arrived at her destination in a cataclysmic explosion. Draining a hapless vagrant she was able to heal from her wounds, but her machine was broken beyond repair. She found too that the time travel had done something even more horrible to her already mangled biology. In periods of extreme duress she would transform, her bones lengthening and sharpening, her flesh splitting and heaving, and all manner of grotesquerie marring her usually striking visage.
Afraid of the damage she might do in this more feral form, Jacqueline sought a benefactor to help her set up a lab where she might try to piece together another time machine, or at least concoct some remedy to her newfound affliction. A writer, one Robert Louis Stevenson, gave her refuge and patronage in exchange for full rights to dramatize her tale in his literature. She agreed, as long as it was changed enough to leave her free from suspicion.
*Had a lot of fun with this one, and almost didn't make the deadline! Many thanks to Fetishfaerie-stock for the base image I used for reference ( [link]