Unknownducky
Leave the maid alive, her identity could well be that of grayfia, rem, ram, Raven, makima, Merlin nnt, kaguya otsusuki, lucy Elfen lied, milim Nava, tatsumaki, or arturia pendragon, Most of them are strong, have knowledge of leading and controlling unexpected situations, and know how to take care of people, as well as have experience being servants.