Dolly

Dolly (ドリー Dolly) is an exclusive character and the main antagonist of Hayate no Gotoku! CAN'T TAKE MY EYES OFF YOU. Dolly appears to have magical powers, being able to block Isumi's spell tags, and able to manipulate plants at will.

Dolly has long flowing Aquamarine colored hair and yellow eyes. She is always seen wearing a black one piece dress along with Shin's wedding ring.

At first, Dolly appears to have a calm, dark demeanor. However, it is revealed that she has a somewhat obsessive personality over the Kurotsubaki, going to great lengths to gain posession over it.
(Source: Hayate no Gotoku Wiki)