Maria

(Source: MyAnimeList) Maria is Nagi's maid and surrogate older sister/mother, both appearing and acting in a manner more mature than people typical of her age. Because of this, even people near to her speak of her as if she is older than she really is, a pet peeve for her. A phrase she commonly responds back with is "I'm still a fresh seventeen year old." She is the character with the most common sense, although her sense of value in money is as bad as Nagi's, and appears to be the one in charge of everything in Nagi's manor, since everyone from the head butler to the SP either obeys or...