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