Perhaps a stripper-by-day, crusader-by-night? Or perhaps more of a Charlie's Angel type? An agile footsoldier for a savvy mastermind who never dirties his own hands. Except her relationship with her master is far more intimate than the iconic TV characters.
Either way, she exudes her considerable sexuality in just the right way; strong, without being smutty. You've made her beautiful, as opposed to just very good looking.
And of course, the quality of your artwork is above reproach - your use of light and shadow on her body, her hair, those magical wisps of energy encircling her, and most of all, her devilish expression have all been carried out incredibly well.
I don't comment often, so I wish to say this now. And I want you to know that it applies to all of your work.
You, my good sir, are one of the most talented artists I have ever seen. The way you manipulate light, color, lines, space and everything makes me always stop for a moment and ponder whether you are showing me a drawing or a picture. Never stop drawing, you are far too talented.