Hestia

Hestia is the goddess of the hearth and home.

Past
Hestia was the first born child of the Titans Kronos and Rhea. She was deemed as the goddess of the hearth and home, and every home in Greece had a sacrificial flame in her honor. http://greekitup.net/Views/images/stories/Hestia.jpg This is a picture of Hestia.

The Lightning Thief
Hestia is first mentioned by Chiron to Percy while discussing the arguments between Zeus and Poseidon, and how she, along with their sisters, Demeter and Hera, could possibly calm them down.

It is revealed that the little girl stroking the hearth when Percy first arrived at camp, was Hestia.

The Last Olympian
Hestia is set to make her first appearance in the series. She first appears as an eight year-old girl in Westport, Connecticut after Percy and Nico meet Ms. Castellan. She states that she is the last Olympian because she doesn't have any grand stories and was apart of what makes the west important, but when all else failed the hearth would be the last thing standing. She gives Percy constant visions of Luke's upbringing as a way to understand what he's gone through and why he made the choices that he did. At Olympus, She helps Rachel realize her destiny as the Oracle at Delphi. In the end, Hestia reminds Percy that home and family are important. It is this that makes Luke resurfaces when Annabeth reminds him that he said he would protect her and that they were a family. She also has a minor part in the fight with Kronos where she super heats the sythe when it falls in the hearth; assuring it canot be handled. Percy then see's her image in the flames scowling at her father. At the end of the series, she is seen again as a little girl stroking the hearth at Camp and winking at Percy.She is now guardian of Pandora's jar.

Relationships
When Mr. D became a god, she gave up her seat on Olympus to tend to the hearth. She appears to be of calm mind and a peacekeeper, so instead of participating in the fights, she took herself out and placed someone else in her place. She vowed to be a virgin forever and therefore has no demigod children. She also appeared to like Nico has he was one of the first people to talk to her in years.