These roles/purposes had effects on Greek literature, including The Odyssey, which would not have been completed, or at least in the manner that it did if it weren’t for Zeus’s presence. As peacekeeper, he kept Poseidon from killing Odysseus after he (Odysseus) blinded Poseidon’s son, Polyphemus, while on the island of Calypso.

 More information can be found at:     https://greekgodsandgoddesses.net/goddesses/circe/

  Aeolus, the keeper (god) of the winds. His purpose was to manage the floating island Aeolia, which he was the ruler of, using his power.
 
Popular Myth:
  A myth that he was a part of was giving Odysseus a bag that contained winds that would take him home. He is first introduced in book 10 of the Odyssey. But others thought that it had riches in it, thus opening the bag and having the winds escape.

Depiction/Role in the Odyssey:
  In the Odyssey it did describe him as mortal, yet he was ultimately a god in other works or the different versions of him. Still charged with the task of being keeper of winds.
The winds are usually depicted as being horse shapes and either are said to be gods or spirits-
(www.theoi.com)

 Although Odysseus needed help, Aeolus tried but refused after Odysseus messed up his first chance.
   
 

Parents are Cronus, one of the youngest of the titans and the son of Uranus and Ge, and Rhea, sister of Cronus and responsible for the low of the kingdom. Married to Amphrite who was the goddess of the sea, fish, and shellfish. He has many children but some of the more notable ones are Triton, who is the fish-tailed son of Poseidon and Amphrite, Polyphemus, who is the giant man eating man, and Pegasus, who is the famous immortal horse with wings.

Poseidon was the god of sea, floods, earthquakes, drought, and horse. “He was depicted as a mature man with a sturdy build and dark beard holding a trident (a three-pronged fisherman's spear)”(theoi.com).He is the protector of the sea and sailors would rely on him for safe passages by sea. He is considered the most bad-tempered, moody, greedy, and also very vengeful Olympian.

He despises Odysseus for blinding his son, Polyphemus. So he attempts to make Odyssues suffer on his journey back, but he cannot kill him because he is destined to return. Poseidon’s wrath was truly incurred by Odysseus’s pride. Odyssues mocked and talked down to Polyphemus whilst he was leaving the island of the Cyclops. When Odysseus set sail away from Calypso’s island, Poseidon spotted him and caused him to become shipwrecked.

As Rhea birthed each child Kronos was waiting to eat the children. Poseidon, Hades, Hera, Demeter, and Hestia were all swallowed but Rhea switched Zeus for a rock and Kronos swallowed the rock instead of Zeus. Zeus was born on Crete where he was taken care of until he was big enough to take on Kronos. Zeus eventually engaged Metis who gave Kronos a drug that forced him to vomit up the rock and his five other children.

        Athena is the goddess  of war and wisdom. She provides counsel for rulers and war leaders. In addition she is the patron of wool-working and other crafts including metal work, carpentry, ship building, spinning, and weaving. 

        One popular myth associated with Athena is her and Poseidon fight for control over Athens. They competed in a contest to create an offer a gift that was valuable for Athens. Poseidon created a well in the ground using his trident, however the water turned out to be salty. “Athena brought forth an olive tree from the ground by the touch of her spear and she was proclaimed the victor. The olive was fundamental to the Athenian economy and life.” (global.oup.com) Athena was therefore chosen to claim the city. She became the patron goddess and protector over Athens. 

        Athena helps and mentors Odysseus throughout his journey in The Odyssey. In book 5 she controls the winds so that they blow Odysseus to the Phaeacian shore. In book 22  where Athena appeared as a mentor. She turned into a swallow and flew to a beam to watch the fighting. The suitors shot arrows at Odysseus, but Athena made sure the arrows missed Odysseus again and again. Throughout The Odyssey, she also helped Telemachus many times. She disguised herself as Mentor and visited Telemachus, advised him to travel to Pylos and Sparta to gather information about his father's whereabouts, helped Telemachus escape Ithaca, and visited Penelope in a dream to ease her mind about her son's journey. Wisdom and selflessness allowed her to successfully guide and mentor Odysseus throughout his journey.