Well, then she is Sandra. Sorry for not coloring at all ^^;
She is a witch who has the powers to travelling in time, and manipulating time. (She can also speed up time on anything, what she likes to use on parts of others body for torture XD)
Actually she's my heroine from an other timeline. My heroine (Kassandra) accidentally appeared in her timeline, and caused the death of their best friend/love. No wonder Sandra became insane, and about to kill Kassandra.
Well, feel free to ask if my drawing and the colors aren't obvious ^^;