Olympian Gods

Zeus
King of the gods and ruler of Mount Olympus; god of the sky, lightning, thunder, law, order and justice.
Zeus is the youngest child of Cronus and Rhea, whom Rhea hid from her husband and instead gave him a boulder in place of the baby to eat. As Zeus grew in secret, his first wife convinced him to infiltrate his father's and give him poisoned wine. After he did that, Cronus vomited back up all of Zeus' brothers and sisters that he had eaten before him. After defeating his father during the Titanomachy, Zeus has crowned the obvious leader of the gods, and ruler of the skies. He married his sister Hera but continued to have many affairs with practically every woman he ever wanted.
⚡ Symbolized by thunderbolts, eagle, oak tree, bull, sceptre, and scales.

Hera
Queen of the gods and the goddess of marriage, women, childbirth and family.
Hera is the youngest daughter of Cronus and Rhea and the sister and wife to the unfaithful Zeus, who tricked her into marrying him in the first place. Through all his affairs she stayed loyal to him. But because of her jealousy, she acted out in vengeance against all the women he had been with, and their bastard children.
🦚 Symbolized by the peacock, cuckoo, and cow.

Poseidon
God of the seas, water, storms, hurricanes, earthquakes and horses.
Poseidon is the middle son of Cronus and rhea and part of the big three with his brothers Zeus and Hades. When they were drawing domains of the world to rule, Poseidon was given the sea. He was known to have a short-fused temper and get into disputes with many other gods, and a deafening yell that was equal to 10,000 men. Like most of the gods he had a wife, a Nereid Amphitrite, and children with her, but he also had many lovers and bastard children, including the winged horse, Pegasus.
🔱 Symbolized by the horse, bull, dolphin, and trident.

Hades
King of the Underworld
God of the dead and riches
Hades is part of the big three, with his two younger brothers Zeus and Poseidon. after the defeat of their father Cronus, the brothers drew sticks to decide who rules what, and Hades was given the underworld. Often he is mistaken for the god of death, Thanatos, but he is just the ruler of dead souls after they die.
He is infamously known for the abduction of Persephone that lead to her becoming his queen and being forced to spend 1/3 of the year with him. This was one of the rarer times he left the Underworld.
🗝️ Symbolized by keys, the Cornucopia, the Sceptre and the Cypress.

Ares
God of war, violence, bloodshed and manly virtues.
Ares was the first child of Zeus and Hera. Like his half-sister Athena, he is also the god of war, but not strategy like her, instead, he is the personification of brutal violence. Even though all of the gods were pretty brutal at times, he was not well-liked for his violent tendencies by the gods or by mortals, with the few exceptions of his lovers. Most notable was the affair he had with the goddess Aphrodite, in which they were caught, captured and shamed by the other gods.
⚔️ Symbolized by the boar, serpent, dog, vulture, spear, and shield.

Athena
Goddess of wisdom, handicraft, and warfare
Athena is the daughter of Zeus and his first nymph wife Metis. After he learned that his next child would overthrow him, he tricked the pregnant Meti to turn herself into a fly which he then swallowed. Time passed after swallowing his wife like nothing was wrong until Zeus started having horrendous headaches. He asked his son Hephaestus to use an axe to alleviate the pain, and when he struck him, out popped the full-grown and fully-armoured Athena.
🦉 Symbolized by the owl and the olive tree.

Demeter
Goddess of the harvest, fertility, agriculture, nature and the seasons.
Demeter is from the original generation of Olympians, born of Cronus and Rhea, and had incestuous relationships with two of her brothers Zeus and Poseidon. Demeter is most commonly known as the mother of Persephone, even though she had other children. The kidnapping of her daughter Persephone drove her into a depression as she searched for her, and all of the crops died, creating the explanation for winter.
🌾 Symbolized by the poppy, wheat, torch, cornucopia, and pig

Hephaestus
The god of the forge, craftsmanship, invention, fire, and volcanos.
Hephaestus lives inside a volcano in the belly of Mount Olympus, and is the blacksmith of the gods, creating all of the weapons they wield, including the lighting bolts used by Zeus.
He is the son of Zeus and Hera and was so ugly that he was thrown out of Olympus by his mother which then caused him to have a permanent disability. He is also the unfortunate husband of Aphrodite.
🔥 Symbolized by the fire, anvil, axe, donkey, hammer, tongs, and quail.

Hestia
Goddess of the hearth, home, domesticity, virginity, family, and the state
She was the eldest daughter of Cronus and Rhea and part of the first generation of the Olympians. She made a vow to eternal virginity to keep the peace on Olympus as she had multiple suitors. To reward her for her sacrifice, Zeus offered her the first portion of all human offerings.
There are not very many stories that contain the goddess, and it is said that is because she was always at home tending to the eternal fire. But a really sweet notion was made that she can be heard laughing in a crackling fire.
🔥 Symbolized by fire, the hearth, pig, cow, wine, oil

Apollo
God of light, the Sun, prophecy, philosophy, archery, truth, inspiration, poetry, music, arts, manly beauty, medicine, healing, and plague.
Apollo is the son of Zeus and the Titan goddess Leto, and the twin of the virgin goddess Artemis, who helped their mother deliver him 9 days after her birth. Apollo was regarded as the most beautiful male god and the embodiment of the perfect male physique. He is one of the most popular gods in mythology, being referenced in legends almost as often as his father. Being as beautiful as he was he also had many lovers both mortal and immortal.
☀️ Symbolized by the Sun, bow and arrow, lyre, swan, and mouse.

Artemis
Goddess of the hunt, the wilderness, virginity, the Moon, archery, childbirth, protection and plague.
She is the daughter of Zeus and the Titan goddess Leto, and the twin of the sun god Apollo, whom she helped her mother deliver as a baby. Being very protective of her mother and her priestess, she also had a side of vengeance and cruelness when it came to punishing those who offended her, even her own priestess if they were in decent.
🦌 Symbolized by the Moon, horse, deer, hound, she-bear, snake, cypress tree, and bow and arrow.

Aphrodite
The goddess of love, beauty and sexuality
There are two variations of the birth of Aphrodite, that change her direct lineage. The version from Homer's Illiad states that she was the daughter of Zeus and the Titaness Dione. Whereas Hesiod states that she was born from the blood of the castrated Uranus falling into the ocean and becoming seafoam (aphrós) and then emerged full-grown, naked, and breathtaking. The two stories do change some details of other accounts of the goddess of love, like how she was pursued by Zeus, (who might be her dad or not) and the other gods, but to save her for himself, he married her off to Hephaestus, knowing she would not remain faithful.
Aphrodite had many lovers, both mortals and immortal, and was named as the stater of the Trojan war after she told Paris she would get him the hand of the woman of his choice, who was Helen of Troy.
🕊️ Symbolized by the dove, apple, bee, swan, myrtle, and rose.

Hermes
The god of travel, commerce, communication, borders, eloquence, diplomacy, thieves, and games.
Hermes was the messenger of the god, who also worked to guide the souls of the dead to the Underworld. He was the son of Zeus and the celestial nymph Maia (one of the Pleiades), making him the second-youngest Olympian, over Dionysus.
⚕️ Symbolized by the caduceus (staff entwined with two snakes), winged sandals and cap, stork, and the tortoise (whose shell he used to invent the lyre).

Dionysus
God of wine, the grapevine, fertility, festivity, ecstasy, madness and resurrection.
Later he was made the patron god of the art of theatre.
Dionysus is the youngest of the Olympian gods, and also the only one who was born from a union of Zeus and a mortal princess, Semele. He is also the creator of wine and gave the gift of winemaking to mankind. It was said that he had two sides to his being, one of joy and festivity, and the other of blind range, meant to show the two sides of consuming wine.
🍇 Symbolized by the grapevine, ivy, cup, tiger, panther, leopard, dolphin, goat, and pinecone.