The Nāfuel will be the followers of Virūpākṣa (Pāli: Virūpakkha), among the list of 4 Heavenly Kings who guards the western path. They work as guards on Mount Sumeru, defending the dēvas of Trāyastriṃśa from attacks via the asuras. The nāga in Indonesia mainly derived and motivated by Indic tradition, https://128.199.208.170/