“You—did what—to my mother? A demon? I am half-demon?” “He was a Greater Demon, if that comforts you. Most of them were angels once. He was fair enough in his own aspect.” Mortmain smirked. “Before your mother became pregnant, I had worked for years to finish my father’s clockwork angel. I finished it, and after you were conceived, tuned it to your life. My greatest invention.”