The Nāfuel are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), one of several 4 Heavenly Kings who guards the western route. They work as guards upon Mount Sumeru, safeguarding the dēvas of Trāyastriṃśa from assaults by the asuras. At the center with the Naga Empire’s cultural identification was serpent worship. https://128.199.208.170/