The Nāgas would be the followers of Virūpākṣa (Pāli: Virūpakkha), among the list of 4 Heavenly Kings who guards the western route. They act as guards on Mount Sumeru, protecting the dēvas of Trāyastriṃśa from assaults because of the asuras. Devī Manasā is understood within the Heavens, inside the abode https://128.199.208.170/