Tempest

Tempest is one of the Gray Sisters, the other two being Anger and Wasp. The Gray Sisters shared one eye and one tooth between them. They run their own taxi service, where any god or demigod can summon them unless you are outside of New York.

The Sea of Monsters
The Gray Sisters appear when Annabeth calls their taxi outside Percy's school (Meriwether College Prep) after they are attacked. Annabeth, Percy, and Tyson all get into the taxi and the Gray Sisters drive them to camp. While driving them to camp, Tempest also fights with her sisters about who gets the eye and tooth.The eye ends up flying into the back of the taxi where Percy demands for answer. The sisters end up giving him the coordinates for the Golden Fleece.