The Nāgas are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), among the list of 4 Heavenly Kings who guards the western route. They work as guards on Mount Sumeru, preserving the dēvas of Trāyastriṃśa from attacks with the asuras. Devī Manasā is thought while in the Heavens, in the abode https://128.199.208.170/