Unknown, but some good guesses can be made simply as a vamp playing cards with gangsters and criminals at the Rat Trap. She was plausibly affiliated with Ratigan and his gang. However, she was also plausibly fearing them.
Role in the film
Disguised like sailors to find Ratigan's repair, Basil and Dr. Dawson are present at the Rat Trap to find information. Accidentally, Dawson pushes her. She mimicked seducing him, before laughing in a cynical way and exhales smoke on his face.