Ovi, a globule-shaped entity, appears to the protagonist following her sister’s assault by tentacled Zoid invaders. It empowers her with magical girl abilities to oppose the extraterrestrial forces, serving as a battle guide by tracking energy reserves and signaling when attacks are primed. During clashes, Ovi hovers overhead, analyzing threats, dispensing strategic cues, and voicing encouragement—though its demeanor shifts to anxious vigilance as dangers intensify.

Loyalty drives Ovi to act despite personal risk, such as hurling itself at a mind-control boombox to disrupt its signal. These interventions leave it battered: slammed against a knee, flung afar by an antagonist, and later bearing communication-impairing injuries. In a climactic sacrifice, Ovi channels amplified power into the protagonist to confront the Zoid overlord, expending itself to enable her victory.

Its dialogue brims with upbeat affirmation, celebrating the protagonist’s prowess mid-combat. Ovi displays expertise in supernatural energies, identifying hostile anomalies and cautioning against their hazards. Their dynamic hinges on interdependence—Ovi supplies magical aid while relying on the protagonist to fulfill their joint mission of Earth’s defense.

The entity’s origins, species, and activities beyond recorded incidents remain unspecified.