The Nāfuel will be the followers of Virūpākṣa (Pāli: Virūpakkha), one of several 4 Heavenly Kings who guards the western course. They act as guards upon Mount Sumeru, guarding the dēvas of Trāyastriṃśa from attacks because of the asuras. In some cases, the kings by themselves participated in religious ceremonies, https://128.199.208.170/