Matsukai Mao is a Japanese VTuber affiliated with Nijisanji. Debuting alongside Emma★August and Luis Cammy, she forms the trio known as "Aka no Soshiki" (The Red Organization). Mao, a familiar with the task of deceiving people on behalf of her master, often ends up being clumsy and useless. Despite her pronouns being she/her, Mao is a demon in a woman's body and identifies as genderless. She possesses a unique personality, describing herself as a genius but often displaying naivety and silliness, which only adds to her adorable charm. With her YouTube debut in November 2019 and subsequent 3D unveiling stream, Mao has garnered a dedicated following, showcasing her talent in making animations and entertaining her viewers.