Hearing and seeing the knob turn around, Malphus had quickly jumped out of the same window he had got in but he never left. He stood right next to the window, with his back on the wall while waiting for the maid to leave.
Though the maid had smelt the presence of a human in the room, she didn't know that the person who had entered was still nearby watching her through the window as he peeked in. Having enough practice of hiding and jumping from one building to another, Malphus waited as he watched the maid for his mouth to open wide to what he caught in view.
