Mao Haohao is a character from the anime series Hozuki no Reitetsu, a dark comedy that explores the bureaucratic and often humorous inner workings of Hell. Mao, whose name is repetitive and playful, adds a touch of whimsy to the series. She is known for her mischievous personality and her interactions with the protagonist Hozuki. Despite her playful nature, Mao plays a vital role in highlighting the lighter side of the afterlife, balancing the otherwise serious and sardonic tone of the series.