Aka Manto, aka Red Cape or Red Mantle, is a Japanese urban legend about a masked spirit who wears a red cloak and appears to people using public or school restrooms.Aka Manto, aka Red Cape or Red Mantle, is a Japanese urban legend about a masked spirit who wears a red cloak and appears to people using public or school restrooms.Aka Manto, aka Red Cape or Red Mantle, is a Japanese urban legend about a masked spirit who wears a red cloak and appears to people using public or school restrooms.