Dragon King

He can manipulate and control the weather, move seasons and bring rainfall with their devine power at their own will, thus, they are regarded as the dispenser of rain, devine rulers of the Seas, rivers and water bodies, commanding over all bodies of water. He is the collective personification of the ancient concept of the ''lóng'' in Chinese culture and Nāgarāja in Indian culture. It is described that they have their own under-water palace and a royal court system of their own.
There are also the cosmological "Dragon Kings of the Four Seas" ().
Besides being a water deity, the Dragon God frequently also serves as a territorial tutelary deity, similarly to Tudigong "Lord of the Earth" and Houtu "Queen of the Earth".
Origins
Serpent like creatures have been regarded as core part of Asian culture since 7000–5000 BCE (Neolithic period) at least. Numerous Serpent like crafts, marks and designs have been discovered in many archeological sites from south, southeast and east asia (Notably from ancient archeological sites of China and India), which proves that the serpent/naga/dragon symbolically has been part of the local folklores, rituals and festivals in these areas from a really long time. As time has passed the Dragon culture has been adapted and shifted in various forms, terms, tales and cultures through generation around these regions and the folk-religious cultures. Provided by Wikipedia