Kei's grandfather discovered Amala alongside the Devadasy mech roughly twenty years before the main events. Despite the elapsed time, she maintains a teenage girl's physical appearance. Her origins and core nature remain undefined, casting her as an enigma with potential non-human traits.

Amala acts as Devadasy's primary power source, demanding direct physical pairing with pilot Kei to generate energy through sexual transfer. During piloting sessions, nanomachines emerge as green scales across her body, synchronizing her arousal with Kei's to forge a proxy sexual link. This process culminates in her sexual climax, unlocking the mech's maximum operational capacity.

A central narrative thread explores Amala's dual relationship with Kei. She engineered his conception and birth decades prior as his biological creator, tailoring him for a Devadasy-linked purpose. Simultaneously, she engages in repeated sexual encounters with him, establishing a disturbing dynamic where she embodies both maternal and sexual partner roles. This duality peaks when she impregnates Kei with a mechanized entity—facilitated by their union, the Devadasy system, and an earlier forced assimilation by an antagonistic nanomachine force.

Her ultimate goal manipulates Kei's existence to achieve a specific reproductive outcome. The plan concludes when Kei enters labor while piloting Devadasy. Amala simultaneously experiences a parallel birthing event with the mech itself via an abstract, astral-projection-like mechanism. Completing this birth cycle ignites a catastrophic nanomachine crisis.