The Nāfuel are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), among the Four Heavenly Kings who guards the western course. They act as guards upon Mount Sumeru, shielding the dēvas of Trāyastriṃśa from assaults because of the asuras. At the guts of the Naga Empire’s cultural id was serpent worship. https://128.199.208.170/