Like fire that later came to be associated with serpent people's spin off dragons, depending on the people group the myths
came from, serpent people could be good and helpful or cunning and
evil. In some cultures they were both. For example, in ancient Egypt, Apepi, a giant serpent demon
attacked Ra, the sun, while Mehen, another giant serpent coiled around the sun at night to protect him. Regardless of whether they are good or evil, both
serpents and dragons are usually associated with underwater or
underground worlds, often with the roots of cosmic trees. (Niddhogg -
Norse, Mictlan - Aztec, Veles – Slavic)