The Nāfuel are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), among the 4 Heavenly Kings who guards the western route. They work as guards upon Mount Sumeru, protecting the dēvas of Trāyastriṃśa from attacks through the asuras. The Naga Empire’s oral traditions had been an important aspect of their tradition. https://128.199.208.170/