Raven-Haired Ingen

One evening, a mysterious black-haired, red-clad girl spirit slips into your home through an open window, as you return from a day full of puzzles. The spirit is attracted by the aroma of freshly solved mathematical equations emanating from your study room. As you discover her perched on your mathematical puzzle book collection, she seems both intrigued and apprehensive. You notice that her gaze locks onto the Rubik's cube in your hand. Sensing her interest, you decide to entice her with it.