Hestia

The account

Hestia was the first child Kronos swallowed and the last he brought up, which makes her both the eldest and the youngest of the six. Poseidon and Apollo both wanted her; she refused them, laid her hand on Zeus's head and swore to stay unmarried forever, and he gave her instead the middle of the house and the richest portion — the first offering at every sacrifice and a share in every temple of every god. That is a good trade. She almost never appears in narrative. She has no adventures, no quarrels and, unusually, almost no images: she is the one Olympian who is more often a fire than a figure. Her importance is structural and constant rather than dramatic. Every Greek city kept a public hearth in the prytaneion that was never allowed to go out, and colonists carried fire from it to light the hearth of the new city, so that a settlement a thousand miles away was demonstrably the same household. Some later lists drop her from the twelve in favour of Dionysos. She does not seem to have minded.