Florence Finnegan was the alias assumed by a Plasmavore criminal hiding on the planet Earth from the Judoon and masquerading as a human. Her real name, if any, is unknown.
Biography
Like other Plasmavores, she subsisted on blood for nourishment. She fled to Earth to escape capture by authorities and had the ability to change her internal physiology to match that of native life forms if she had also absorbed their blood.
Checking into Royal Hope Hospital, Florence claimed to be salt-deficient as an excuse for being there (saying that she had only eaten salad over the previous days). It was actually the case that, being a Plasmavore, she absorbed it well. She commanded two Slabs, one of which was killed by the Tenth Doctor and the other by the Judoon. She also owned a stripy red and white straw with which to suck her victims' blood.
Her known victims include the Child Princess of Patrivolde Regency 9 and Dr B. Stoker, a doctor at the Royal Hope Hospital, whom she killed to assimilate his blood so she would appear biologically human to the Judoon scanners. She also drained the Doctor of blood and in so doing nearly killed him, however, this enabled the Judoon to recognize her as not human and therefore, the fugitive they had to capture. The Judoon then killed her, but not before she could activate the stasis chamber. (DW: Smith and Jones)