The Nāfuel are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), one of many 4 Heavenly Kings who guards the western route. They work as guards on Mount Sumeru, defending the dēvas of Trāyastriṃśa from attacks with the asuras. The Naga Empire’s oral traditions were a vital aspect of their culture. https://128.199.208.170/