Nārāyaṇī —The Śakti
Lakṣmī, the primordial name of Śakti, is revealed in the Sītā Upaniṣad as Trivarṇā—the Divine in three eternal modes: Śrī, Bhū, and Nīlā. These correspond to the three cosmic powers, icchā (will), jñāna (knowledge), and kriyā (action), through which the Absolute manifests, sustains, and nourishes the universe.
This Trivarṇā Lakṣmī is the core of our Vidyā. We can suffix or prefix - Mahā, Parā or whatever, core always remains Lakṣmī whom we worship as Śrī Vanadurgā Mahāvidyā.