Molly totally does not look like her name.  Visually she is tall, lithe, slim, an aristocratic looking beauty (intial unmodified CHA of 18). with an elegant swaying walk redolent of noble privilege.  Her wavy red hair is perfectly cared for, elegantly pulled back, her face is expensively made up, she is expensively perfumed., But when she opens her mouth out comes a stream of profanity laced lowest class possible thieves cant, it even laces her common... (i will use my attempt at cockney).  Molly looks to be 18 years old.  Her demeanor is one of winsome innocence when on the make, and one of defiant "Wots it too ya, chum?" truculence when openly herself.