Nisshoku is a Shadow, a creature of pure nothingness and created by the Goddess of Nothingness, Anikki. Despite his freakish all black body, he doesn't seemed worried about his appearance, and is rather okay with answering questions about himself and his origin. While he was originally a mindless shadow, he's adapted and has taken a gentlemen like personality to those around him, being professional in both his duty as a shikigami and a shadow. Wise. Relaxed. Professional. Analytical. Calm.