KAITO is a Virtual Singer in the Empty SEKAI, a dead world containing hardly anything in it. There are a few dim rays of light, broken stage equipment, fallen stage truss, and pyramids that are cold to the touch. It is possible to get lost in this SEKAI due to its vastness, as well as how similar the place looks. At a specific location, it reverberates sound differently. KAITO has blue eyes, somewhat unruly dark blue hair, and blue painted fingernails.