The Nāgas are definitely the followers of Virūpākṣa (Pāli: Virūpakkha), on the list of 4 Heavenly Kings who guards the western way. They work as guards on Mount Sumeru, protecting the dēvas of Trāyastriṃśa from assaults via the asuras. The strategic site of your Naga Empire authorized it to work https://128.199.208.170/