Diana

Diana (ディアナ, Deiana) is a fictional character and major antagonist in the popular manga and anime series MÄR. She is the Queen of the Chess Pieces, through extension the second strongest member, the former queen of the Kingdom of Lestava, and the key opening all events in the series. Diana is initially sinister, selfish, and uninterested in anything as long as those of a lower rank can do her biddings without fail. As the Chess Piece Queen she is one of the two heads of a twin-headed snake commanding the Chess army, made Lestava Castle a safe haven for the army, and shaping MÄR-Heaven into a land of war and destruction. Remaining in the background at all times, Diana pulls the strings of the Knights, using them as her ultimate weapons for her plan to conquer both MÄR-Heaven and Ginta's world. Unknown to anyone else, including herself, Diana's true self is still locked away inside of her, clouded by the influence and manipulation of the King. Only through death can she be brought back to her true self, as evident with her battle with Dorothy. - MAR Wiki