Hestia. Sister of Zeus, Poseidon, Hades, Hera, Demeter.
In mythology the making of the home of the gods and goddesses of Olympus was began when Hestia brought the foundation of a hearth to Olympus, thus she made Olympus the home - and no home of mortal or gods would be complete without a hearth of fire (Hestia).
Hestia is the Greek goddess of home, hearth, fire, and altar, this meaning she embodied the ideal of community worship in home and in the city - there was a "temple hearth" in every Greek city and town where the community would worship. Today "hearth and home" embody her essence, as well as to "keep the home fires burning".
Hestia is the goddess of the hearth, so she is supposed to watch over and protect housewives and also pregnant women.
Vulcan was the god of fire and Vesta was the goddess of fire. Vulcan was the Roman equivalent of Hephaestus, the lame smith of the gods. Correction: Vesta was the goddess of the hearth. Not quite the same.
Hestia is the goddess of the hearth, which is a fireplace. She is also keeper of the hearth at Mount Olympus. One myth says that before humans had fire, Hestia looked after the flame for the gods. But Prometheus managed to charm her into giving him some of the flame to share with the mortals. Therefore, it makes sense that a flame would represent Hestia.
The Trident of Poseidon
None of the Greek gods or goddesses had a unicorn symbol.
Hestia was the goddess of hearth and home. In some myths she is one of the Twelve Olympians, but others she gave up her seat for Dionysus, the god of wine. Her Roman equivalent is Vesta. She is also a virgin goddess and in Greek mythology she is the daughter of Kronos and Rhea.
There are 37 gods of fire. The most well known of them is the Greek god Hephaestus. He was the son of Zeus and Hera.
She tended the hearth, made peace between the other gods and mortals, and watched over kids.
The goddess Demeter.
The gods created fire, but kept it for themselves. Prometheus stole it from the gods and gave it to the humans.