Hannah Gruen is Carson Drew's housekeeper. She can be called during some of Nancy's cases, but Message in a Haunted Mansion is the only one in which she will pick up. She is mentioned in many other cases and is like a mother to Nancy. She hasn't been physically seen in a computer game.
Personality: Hannah is a very caring, loving, understanding person. Nancy thinks of Hannah more as a mother than a housekeeper. Hannah often fears that Nancy will be killed on her cases, and she keeps an eye on Nancy while Mr. Drew is away on business.
In The Haunted Carousel, Hannah writes an email to Nancy saying that Togo, Nancy's dog, lost his favorite yellow squeaky toy under the TV cabinet and is refusing to eat.
Appearance: Hannah has not appeared in any Nancy Drew game yet, but she is a phone character in Message in a Haunted Mansion.