Cerberus was the offspring of Echidna, a hybrid half-woman and half-serpent, and Typhon, a fire-breathing giant whom even the Greek gods feared.

His great service to the Olympic pantheon was to slay the chthonic serpent-legged monster Echidna as she slept in her cave.

In Greek mythology, Echidna (, ekhis, ἔχις, meaning " she viper ") was half woman half snake, known as the " Mother of All Monsters " because most of the monsters in Greek myth were mothered by her.

According to Apollodorus, Echidna was the daughter of Tartarus and Gaia, while according to Hesiod, either Ceto and Phorcys or Chrysaor and the naiad Callirhoe were her parents.

Although to Hesiod, she was an immortal and ageless nymph, according to Apollodorus, Echidna used to " carry off passers-by ", until she was finally killed where she slept by Argus Panoptes, the hundred-eyed giant.

Echidna was the mother by Typhon of many monstrous offspring, including:

However Hesiod's genealogy here is unclear, he says these two were fathered by Orthrus, but he has been read variously as saying that Echidna, the Chimaera, or even Ceto, was their mother.

Ladon, the dragon which guarded the golden apples in the Garden of the Hesperides, was also born of Echidna by Typhon, according to Apollodorus, and Hyginus, but according to Hesiod, Ladon was the offspring of Ceto and Phorcys.

In Greek mythology, Orthrus ( Orthros ) or Orthus ( Orthos ) () was a two-headed dog and a doublet (" brother ") of Cerberus, both whelped by the chthonic monsters Echidna and Typhon.

According to some sources, it was he rather than Typhon that sired, with Echidna, further chthonic monstrous creatures: the Chimera, the Sphinx, the Lernaean Hydra, and even, Hesiod says, the Nemean lion, and Cerberus.

He was known as the " Father of all monsters "; his wife Echidna was likewise the " Mother of All Monsters.

According to Hesiod, he was the son of Orthrus and Echidna.

According to Hesiod, Ladon was the son of Phorcys and Ceto, instead of Typhon and Echidna.

The Hydra was the offspring of Typhon and Echidna ( Theogony, 313 ), both of whom were noisome offspring of the earth goddess Gaia.

Usually depicted as a lion, with the head of a goat arising from its back, and a tail that ended in a snakes's head, the Chimera was one of the offspring of Typhon and Echidna and a sibling of such monsters as Cerberus and the Lernaean Hydra.

The Chao raising feature was expanded in Sonic Adventure 2 ; Chao may become " Hero Chao " or " Dark Chao " depending on whether the game's " hero " characters ( Sonic the Hedgehog, Miles " Tails " Prower, and Knuckles the Echidna ) or " dark " characters ( Shadow the Hedgehog, Doctor Ivo Robotnik, and Rouge the Bat ) are nicer to them.

In Greek mythology, Gelonus was the son of Echidna and Heracles, he had an older brother Agathyrus and a younger Scythes.

At one point in the development process, there was a possibility for 4 playable characters: Knuckles the Echidna, Tiara Boobowski, Miles " Tails " Prower, and Sonic the Hedgehog, with each character having a unique gameplay style.

His great service to the Olympian pantheon was to slay the chthonic serpent-legged monster Echidna as she slept in her cave.

The fox was one of the children of Echidna.

* Echidna — The leader of the Titans, she was originally a human from Egypt made immortal when the Romans seemingly killed her son.

* Takashi Thomas Yuda ( Also works with Sega, and the original creator of Knuckles the Echidna )-Sonic Riders & Sonic Riders: Zero Gravity

The Short-beaked Echidna is similarly strange, covered in hairy spikes with a tubular snout in the place of a mouth, and a tongue that can move in and out of the snout about 100 times a minute to capture termites.

Serpent elements figure among his offspring ; among his children by Echidna are: Cerberus ( a monstrous three-headed dog with a snake for a tail and a serpentine mane ); the serpent-tailed Chimaera ; the serpent-like chthonic water beast Lernaean Hydra ; and the hundred-headed serpentine dragon Ladon.

Joseph Eddy Fontenrose suggests that for Nonnus Campe is a Greek refiguring of Tiamat and that " she is Echidna under another name, as Nonnos indicates, calling her Echidnaean Enyo, identifying her snaky legs with Echidna's ", and " a female counterpart of his Typhon ".

[...] the goddess fierce Echidna who is half a nymph with glancing eyes and fair cheeks, and half again a huge snake, great and awful, with speckled skin, eating raw flesh beneath the secret parts of the holy earth.

Echidna is also sometimes identified as the mother by Heracles, of Scythes, an eponymous king of the Scythians, along with his brothers Agathyrsus and Gelonus.

Hercules managed to free Typhon and reunite him with Echidna.

While there are different genealogies, in one version the Chimera mated with her brother Orthrus and mothered the Sphinx and the Nemean lion ( others have Orthrus and their mother, Echidna, mating ; most attribute all to Typhon and Echidna ).

As Dr. Robotnik begins to repair the damaged ship, he meets up with Knuckles the Echidna, the last surviving member of an ancient civilization of Echidnas that once inhabited the island.

Referred to in-game as Knuckles the Echidna in Sonic the Hedgehog 2, the game is largely identical to Sonic the Hedgehog 2, with the exception that gameplay is altered due to Knuckles having separate abilities from Sonic or Tails.

Sonic continues to track down Robotnik as he travels through each zone looking for the Chaos Emeralds, once again coming into conflict with Knuckles the Echidna, who believes he is trying to steal them.

The body of the Short-beaked Echidna is, with the exception of the underside, face and legs, covered with cream-coloured spines.

Unlike other mammals, which typically have highly acidic stomachs, the Echidna has low levels of acidity, almost neutral with pH in the 6. 2 – 7. 4 range.

After she and Icarus capture Harmonia, Echidna has the Minotaur dispose of Rygar with a pit torn open in the ground.

Sonic flees, meeting with Tails and Knuckles the Echidna who go to rescue Elise.

There is also, in some versions, reference to an episode where Heracles met and impregnated a half-serpentine woman, known as Echidna ; her children, known as the Dracontidae, were the ancestors of the House of Cadmus.

In Game Developer RIOT's popular Free To Play game, League of Legends, Cassiopeia is a half serpent half woman champion closely related in appearance to Echidna.

Like the Platypus, the Echidna has a low body temperature — between — but, unlike the Platypus, which shows no evidence of torpor or hibernation, the body temperature of the Echidna may fall as low as.

However, learning her son lived and grew into Rygar, Echidna rebelled before Cronus took over her body.

These children tend to be consistent across sources, though Ladon is sometimes cited as a child of Echidna ( by Typhoeus ) and therefore Phorcys and Ceto's grandson.

These children tend to be consistent across sources, though Ladon is sometimes cited as a child of Echidna by Typhoeus and therefore Phorcys and Ceto's grandson.