Artwork and Idea of this adopt was made byhttps://mongoosegoddess.deviantart.com/
As for details, yes: six arms, large thorax. She does have extra 'eyes', which seem to behave in nature to pupil-less insect/arachnid eyes on her forehead and on her cheeks. She can manipulate people's shadows (and their physical body in turn) by using the marionette cross with the strings from the darkness, and often she has a black crystal ball as a means to 'see' things not of the physical world.
When not using her elemental powers, she tends to frequent locations where darkness would common-place, such as nightclubs.