Bonehilda

Bonehilda is a Skeleton NPC that was introduced in The Sims: Makin' Magic and later featured in The Sims 3: Supernatural. She is technically not a normal life state, and unoffically opens a new catagory for the Skeleton which is also shared with the Grim Reaper.

The Sims: Makin' Magic
There are two versions of Bonehilda in the game. One is the janitor on the Magic Town lots A Spooktacular Spot and Vernon's Vault. The other can be bought on residential lots as a magical (and much cheaper) equivalent of Servo. This version of Bonehilda is literally a "skeleton in the closet".

While the "skeleton maid" version of Bonehilda is generally equivalent to Servo, there are significant differences:

Things Bonehilda does that Servo doesn't
 * Feed a baby. Somehow, she manages to do this without waking the baby.
 * Bring in the newspaper.

Things Servo does that Bonehilda doesn't
 * Garden.
 * Attempt to entertain visitors. In fact, non-magical visitors will freak out if they see Bonehilda in action. A walking skeleton is one thing in Magic Town, and quite another in someone's home!
 * Serve food.

Misc. differences
 * Bonehilda seems to place a higher priority on repairing. She'll probably repair a broken dishwasher or sink before trying to use it.
 * Players can send Bonehilda back to her closet by clicking on her and selecting "Dismiss".
 * If a human maid is hired she will freak-out, quit, and leave if she see Bonehilda; she will not return unless officially rehired.

Bonehilda also has a few quirks. If a bar is present, she'll take a drink before heading back to her closet. Naturally, the drink will flow through her and leave a puddle on the floor. If tombstones are present, she may wave to one of them before going back to her closet. She is also a fan of the Grim Reaper, and will try to get his autograph if he appears while she's out of her closet.

The Sims 3: Supernatural
Bonehilda made a comeback in The Sims 3 in The Sims 3: Supernatural, where she plays a role similar role to the one she had Makin' Magic. She will act like a maid, keeping the lot clean and cooking meals. She will also act like a babysitter/pet-sitter, taking care of young Sims and pets, and even teaching pets some tricks. Should a fire start anywhere on the Lot, she will attempt to put it out. She stays inside the Bonehilda Living Quarters, which can be bought in the alarms section of Buy mode.

In order for Bonehilda to do chores, a Sim must "Awaken Bonehilda" at her living quarters. The Sim will wave a key, which causes her to come out. There are only two ways for Sims to interact with Bonehilda: "Dismiss Bonehilda" will allow her to go back to her living quarters, while "Chat with Bonehilda" will allow a Sim to simply chat with her.

Bonehilda has some improvements over regular maids in that she will not charge daily payment. She can also repair broken objects, and may appear at any time of the day as well. Players can have more than one of her at a time, which can be very useful in larger households.

However, Bonehilda is an uncontrollable NPC. She cannot be a part of a household, and Sims cannot build relationships with her.

If The Sims 3: Ambitions is installed, she will not do the laundry.

Gallery
Bonehilda Brunehilde