马尾小媳蒙面大叔
[mă wĕi xiăo xí mĕng miàn dà shū]
It combines ‘a young woman wearing her hair in a ponytail’ and 'a masked uncle.' It might be used by someone with an interest in disguise or fantasy roles, playing up an enigmatic character who alternates between youthful femininity and mysterious older masculinity.