The Nāfuel are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), among the list of 4 Heavenly Kings who guards the western course. They act as guards upon Mount Sumeru, protecting the dēvas of Trāyastriṃśa from attacks through the asuras. Devī Manasā is understood from the Heavens, from the abode from https://128.199.208.170/