The Nāfuel would be the followers of Virūpākṣa (Pāli: Virūpakkha), among the list of 4 Heavenly Kings who guards the western direction. They act as guards upon Mount Sumeru, defending the dēvas of Trāyastriṃśa from attacks through the asuras. The strategic site on the Naga Empire allowed it to work https://128.199.208.170/