what ive noticed is each facility has like a "replacement" in the positions left open after our ciel was overtaken by real seal.like servants for corpse ciel to use like that blonde girl in the maid one,the lady that took care of military men, now i assume its supposed to be doll as the gardener i assume since they are going through the trouble of reviving them but since doll is obviously too broken they may take snake to undertaker and he will fill that role