The Nāfuel are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), one of several 4 Heavenly Kings who guards the western path. They work as guards upon Mount Sumeru, guarding the dēvas of Trāyastriṃśa from attacks through the asuras. At the heart of your Naga Empire’s cultural identification was serpent worship. https://128.199.208.170/