Origin story
As Lalita, the goddess arose from the fire of the churning of the ocean and defeated Bhandasura with her Sri Chakra army. At Chottanikkara she is worshipped in both her fierce and gracious forms, and is sought for relief from mental suffering and possession.
Rajarajeshwari is the supreme form of Lalita Tripurasundari, the cosmic queen who is also the accessible mother. The Sri Yantra, the sugarcane bow and the flower arrows express beauty, sovereignty and the power to grant boons, and her worship is among the highest in the Shakta tradition.
Source: Wikipedia: Tripura Sundari — https://en.wikipedia.org/wiki/Tripura_Sundari