Who is Jezzibella from The Neutronium Alchemist Conflict and what is their importance?

Al Capone's consort, Jezzibella, is described as enigmatic and seductive. She is a mood fantasy artist, meaning that she change her looks to suit any fantasy or situation. For all intents and purposes, it seems to Jezibella who is the real power behind Capone. The reader, however, is left hanging as to her true motivations.