The Nāfuel are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), one of the Four Heavenly Kings who guards the western course. They work as guards on Mount Sumeru, safeguarding the dēvas of Trāyastriṃśa from attacks because of the asuras. The strategic locale from the Naga Empire allowed it to work https://128.199.208.170/