I first thought off LeBlanc From league of legends maybe because she is kinda badass looking or just like a female necromancer take a look at Leblanc and you might find some similarity between them and if u would ask me what's the best name that suits her I only can think of "Isabella" maybe because of that green jewel and the royal looking , you know Isabella name looks more royal for me or maybe I'm just obsessed with the name ?