Nila Devi in the context of "Nagnajiti"

Ranganatha, also known as Ranganathar, Rangan, Aranganathar, Sri Ranga, and Thenarangathan, is a Hindu deity with his origin in southern India, serving as the chief deity of the Sri Ranganathaswamy Temple, Srirangam. The deity is a resting form of Vishnu, recumbent on the great form of the serpent god Adishesha, king of the serpents.

His primary consort is the goddess Sridevi, also known as Ranganayaki. The two other consorts seen next to his recumbent figure are Bhudevi and Nila Devi, both identified as aspects of Mahalakshmi. Most of the deities portray a 'smiling' lord in a sleeping or reclining position over the celestial serpent Adishesha in the sea of cosmic dissolution (pralaya). This is the form in which he is open to listening to all of his devotees' woes, and blesses them. Apart from being worshipped by all Hindus, this form is of particular importance to the Sri Vaishnava community. His name in Sanskrit means "leader of the place of assembly", coined from the two Sanskrit words ranga (place) and natha (lord or leader).