She had scarcely finished signing before the parchment and accompanying  quill disappeared in a burst of purple smoke. The demon that crouched before her began to eagerly fidget and writhe within the circle. He sort of paced, like an animal in a cage, within the barrier. The impatience was clear on his expression and movements- but his voice was measured as he went on,

"Break the circle. Allow me to breach this plane and your wish will be granted." The distortions in his where slightly more eminent now. It was as if three people were talking at once, from the pit of his throat. The blue flames quivered as he spoke and stood stiffly when he did not.

The affects of the contract would most likely begin within the hour. He was entirely unsure of the exact time- given that it often varied concerning the desires. Unsurprisingly this human wanted power. Although, honestly, this did not wholly concern him. He would not be returned to hell until he was called upon- so if this human granted it- he could roam about for some time. A part of him wanted to see how her wish would play out, however, and he was sure that he would stick around just to find out.