The Nāfuel would be the followers of Virūpākṣa (Pāli: Virūpakkha), on the list of Four Heavenly Kings who guards the western direction. They act as guards upon Mount Sumeru, defending the dēvas of Trāyastriṃśa from assaults from the asuras. As historians and archaeologists uncover more details on the Naga Empire, https://128.199.208.170/