CENTAUR

Centaur is a mythical creature from Greek mythology. this creature is half human from head to waist and half horse from waist to feet (literally they have four feet). Centaurs was the descendant of the Centaurus a son of the music god Apollo. their behavior was uncouth and a small amount of wine can drove them wild. There are many things could happen when centaur smell a wine few of them are:
When Heracles felt entertain by Pholus one of the civilized centaur. He offered Pholus a bottle of wine to drink. Pholus could not refuse the offer. When Pholus open the jar of wine, even his brother who was a mile away from them can smell the wine scent and it instantly turn them into crazy or wild. They almost killed Heracles if he not succed driving them off with flaming arrow.
Another thing that happen if Centaur smell a wine is causing Centaur to fight with other guesses in the wedding party of Theseus's friend Peirithous.
There is one centaur named Chiron, he's Cronus's son he served as a tutor for many heroes including Heracles and Jason he taught about music, medicine and also skill of hunting.
From: mythweb.com

TETHYS

Tethys is the titans goddess of water that nourish the earth. She was one of Gaia and Uranus daughter. She was the wife of Okeanos her own brother, the earth encircling, fresh water stream and the mother of Potamoi, Okeanides, and Nephelai. Potamoi is rivers, Okeanides is springs stream and fountain and Nephelai is cloud. Tethys is well known as the nurse or the grandmother. During the war of the Titans, Tethys raised rhea as her god-child she also educated Hera that is why she is called the nurse.
Tethys once ever help Hera by cursing the constellations Ursa Major and Ursa Minor to forever cycle the sky and never drop below the horizone. Hence explaining why they are circumpolar.

from: theoi.com

RHEA

Rhea is one of the daughter of Uranus and Gaia. She married with her brother Cronus. She and her husband Cronus ruled the universe after Cronus defeat his father Uranus. Rhea is called the mother of the Gods because she gave birth to the Olympians. Rhea saved her youngest son Zeus from his own father before he swallow him by exchange Zeus with a rock. She manage to save her son and send him to the Krete island. Later when Zeus has grown up he will fight the Titans and save his siblings that has been swallow by his father.

From: about.com

CRONUS

Cronus is the king of the Titans and also the god of time and ages. He got the position of the king after killing his father Uranus. Cronus wife is Rhea, she give birth to the Olympians like Zeus, Hades, Poseidon,etc. Scared that his children will overthrown him from his position as the king of gods he swallowed them one by one.
Rhea is really mad because she lost her children and try to save her youngest son Zeus by tricking Cronus. She exchange Zeus with rock and she brought Zeus to the island of Krete. When Zeus already growing up he fight Cronus to get his siblings back by forcing Cronus to throw them up, he begin to fought Cronus and the other Titans and defeated him and send him and the other Titans to Tartarus.

From: www.theoi.com

URANUS

Uranus is the god of sky created by Gaia and become her husband and produce the Titans who ruled the world and the giants that he has send to Tartarus (the bowl of the earth) and caused pain to Gaia. Gaia asked help from her son and Cronus agree to help her. She asked Cronus to help her to emascualted Uranus. every night the sky and the earth will meet this is the time when Uranus will mating with Gaia when Uranus get closed to Gaia Cronus cut off Uranus genital with the sickle. The blood from the mutilation give birth to Erinyes, the Giants and Meliae and the genitals that cronus cuts trown away to the ocean a white foam appeared and from the white foam Aphrodite, the goddess of desire and love was born. The sky got separated from the earth and Cronus become the king of the gods.

Gaia the Mother Earth

Gaia is also known as Mother Earth and considered as the Great goddess. She's the first Goddess and then she created Uranus on her own to mating with her and produce children then known as the Titans. They produce twelve children, six Titanes and six Titanides. Gaia described as the earth where the living things live. Every night Uranus and Gaia will meet and then produce their children. Beside the Titans Gaia also give birth to giants Hecatonchires and Cyclops. Uranus send his youngest children to Tartarus and caused pain to Gaia. Gaia asked help from her sons and Cronus agree to help her and killed his own father to help his mother Gaia.

The Titans

The Titans is the elder gods who ruled the earth before the Olympians defeated them and send them to Tartarus. The male Titans known as the Titanes and the female Titans is known as Titanides. The parents of the Titans are Gaea or Gaia and Uranus. Gaia created Uranus and then Uranus becomes her husband. The first generations of the Titans are the parents and the aunts and uncles of the Olympian Gods and Goddesses. There are twelve children of Gaia and Uranus:

• Cronus (aka Saturn)
• Rhea (Cronus and Rhea were the parents of the Olympian gods and goddesses)
• Iapetus (father of Prometheus, Atlas, and Epimetheus)
• Oceanus (father of nymphs)
• Hyperion (father of sun-god, moon, dawn)
• Themis (Zeus' second consort, mother of the Hours, Fates)
• Thea (Hyperion's mate)
• Mnemosyne (mated with Zeus to produce the Muses)
• Phoebe (Coeus' mate)
• Coeus (father of Leto & Asteria)
• Tethys (Ocean's mate)
• Crius (father of Pallas, Astraeus, and Perses)

These first generations of the Titans are the parents of the Olympians. Beside the Olympians they also Titans also produce others offspring from mating with other Titans or other creatures. The second generations of the Titans are:

• Asteria
• Astraea (Dike)
• Astraeus
• Atlas
• Eos (Dawn)
• Eosphorus (or Hesperus)
• Epimetheus
• Helius
• Leto
• Menoetius
• Pallas
• Perses
• Prometheus
• Selene

The ruler of the Titans was Cronus after he defeated his father Uranus and he ruled until his child defeat him and the other Titans and send them to Tartaurus.