Python, slain by Apollo, and the earliest representations of Delphyne are shown as simply gigantic serpents, similar to other Greek dragons. However, although the word "drakaina" is literally the feminine form of drakon (Ancient Greek for dragon or serpent), most drakainas had some features of a human woman. Lamia, Campe, Echidna, and many representations of Ceto, Scylla and Delphyne had the head and torso of a woman.
Echidna was the mate of Typhon and the mother of a huge brood of monsters, including other dragon-like creatures. According to Hesiod, Echidna gave birth to Cerberus, Orthrus, the Chimera, the Nemean lion, the Sphinx and the Hydra. (Other ancient authors, such as Hyginus, attribute even more monsters as children of Echidna such as the Caucasian eagle, the Crommyonian Sow, the Colchian dragon, the Harpies and Scylla.)