Mihato Uesugi

Ren's older half sister who ran away with him. She is said to hide items in forty-nine different places on her body and has admitted to having a 'Brother Complex'. After she and Ren became part of the servant staff, she has shown signs of being lonely without him. She works as Miyu's personal maid. She sometimes gets so jealous that Ren is not giving her attention she tries to think of ways of killing the person that is taking his attention, but usually stopped before anything happens. Despite it sounding morbid it is made in situations to be comical.