Miku Himuro functions as the dimensional coupling system for the mecha Zeorymer, critical to unlocking its full combat potential through her management of data streams that enable teleportation and energy projection. Her human-like facade belies a mechanical core, exposed during co-piloting operations where she physically merges with Zeorymer’s systems. Without her integration, the machine’s efficacy plummets to one-third of its capacity.

Engineered by Professor Himuro as part of a government-backed project, her origins intertwine with tragedy: she is a reconstituted android version of the professor’s deceased wife, transformed after a conflict involving the scientist Wakatsuki. The flawed Dimensional Joint—a duplicate of Wakatsuki’s original system—is embedded within her body, cementing her as Zeorymer’s operational linchpin. This integration demands recurring invasive procedures and physical alterations, accompanied by traumatic, non-consensual interventions.

Despite her artificiality, Miku exhibits emotional complexity, forming an attachment to Zeorymer’s pilot, Masato Akitsu. Their dynamic shifts from transactional cooperation to mutual alliance as they oppose Wakatsuki’s attempts to seize control of the mecha. Her trajectory evolves from compliant instrument to proactive collaborator, confronting existential tensions between her engineered purpose and residual human identity.

In the narrative’s climax, she partners with Masato to redirect a deuterium bomb’s cataclysmic energy into another dimension, sacrificing themselves to safeguard their world. Her arc culminates in asserting autonomy over her programming, reconciling her fragmented history as a human-turned-android, and defying exploitation through decisive agency.