Niko

Niko is the younger of a pair of twin Zashiki-warashi spirits, both brought back from an abandoned human-world ruin by Hoozuki to reside in Hell. Recognizable by her short white hair and pristine white kimono, she is virtually inseparable from her elder twin sister Ichiko. Though her appearance carries the serene stillness of a traditional Ichimatsu doll, her personality is anything but gentle — she is strict, sharp-tongued, and never hesitates to speak her mind. Currently serving as a supervisory officer at Enma Hall, she applies her keen observational skills to oversee and evaluate the conduct of Hell's bureaucratic staff.