Your personae needs to be creative, and human.  The gender of the personae will always match that of the dragon.  Please don't make them perfect supermodels that are gorgeus, smart, friendly, and nice.  I mean, come on, it might be fantasy, but that dosen't mean you can just make the perfect dream babe.  think of a creative name for your personae.  I doesn't have to be far-out and super long, just don't name them things like Bob, Jack, Elizabeth, or any of those common names.  Remeber, be creative!  A picture is nice, but nothing animated.