Hestia

Hestia (Δήμητρα in Ancient Greek) is the goddess of the Hearth and Home. She is also the firstborn child of Kronos and Rhea. Her symbols are the flowering branch, fireplace, cooking kettle, and crane. Her Roman counterpart is Vesta.

History
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. Like Demeter, Hera, Hades, and Poseidon, she was swallowed by Kronos, and spent her childhood inside of his stomach, waiting for her brother, Zeus, to come and rescue her and her siblings.

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 tending the hearth when Percy first arrived at camp was Hestia.

The Last Olympian
Hestia makes her second appearance in The Last Olympian. 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 of Delphi. In the end, Hestia reminds Percy that home and family are important. It is this that makes Luke resurface 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 scythe when it falls in the hearth; assuring it cannot be handled. Percy then see's her image in the flames looking disapprovingly at her father. At the end of the series, she is seen again as a little girl tending the hearth at Camp and winking at Percy. She is now the guardian of Pandora's jar.

Relationships
When Dionysus became an Olympian, she gave up her seat on Olympus, tending the hearth and knowing she will always be worshipped no matter where she goes. She appears to be of calm mind and a peacekeeper, so instead of participating in the fights, she gave up her throne in order to keep the peace among the gods. That was why she gave her throne for her nephew. She vowed on the head of Zeus to be a virgin forever, and therefore has no demigod children. She also appeared to like Nico as he was one of the first people to talk to her in years. She had been asked to marry by both Apollo and Poseidon but was able to turn them both down, by keeping her vow as a virgin for all eternity.

Powers

 * Control over fire
 * Can allow others to witness events from the past, present, and future that deals with the family
 * Since her sphere of control is home and family, friendships and interrelationships are also in her willing
 * Presumably possesses the standard powers of a God