OVA
Description
Iyena, more commonly known as Vaiya, is a central supporting character in the M.D. Geist anime. She is introduced as the leader of a band of wasteland-roaming outlaws or pirates on the desolate planet of Jerra. Her background is rooted in survival; she commands a group of mercenaries or bikers who navigate the violent post-apocalyptic landscape, scavenging and fighting to stay alive.

In terms of personality, Vaiya is portrayed as a strong-willed and capable leader, but she is also driven by a more human and relatable set of emotions than the title character. She is immediately attracted to Geist's overwhelming power and strength, seeing him as a means of security and dominance in a lawless world. This attraction manifests as a deep infatuation, and she is bold enough to offer herself to him, demonstrating a lack of fear and a pragmatic, if not desperate, desire to bind such a powerful force to her side. Her character represents a more traditional, sympathetic human perspective, making her vulnerable to the chaos and violence that Geist embodies.

Vaiya's primary motivation shifts from leading her own gang to aligning herself with Geist. Her actions are largely driven by her feelings for him and her ambition to claim power by his side. When her own outlaws desert the cause, fearing Geist's uncontrollable and berserker nature, Vaiya chooses to stay, showing a level of commitment that borders on obsession. Her role in the story is to serve as the most prominent human foil to Geist's inhumanity. She is the character who names him their leader and attempts to forge a personal connection with him, actions that highlight Geist's complete emotional detachment when he rejects her advances. She accompanies him and the Jerran army on their mission to infiltrate the Brain Palace, the central command facility.

The key and most defining relationship for Vaiya is her one-sided connection with Geist. While she views him as a potential ally and lover, he remains entirely indifferent, focused solely on his drive for endless battle. This relationship ultimately leads to her psychological undoing. During the final mission, while others try to deactivate the apocalyptic Death Force program, Vaiya witnesses Geist deliberately reactivate it. He grabs her, declaring that his fight is only beginning, an act that suggests he might have even killed her.

Her development continues into the sequel, M.D. Geist II: Death Force, where she is revealed to have survived the first film's conclusion. However, she has been deeply traumatized by the events. Suffering from amnesia, she is found living as a scavenger among other survivors, no longer the bold leader she once was. When Geist reappears, her memory and terror return in full force, leading to a famous scene where she screams that he is the Angel of Death. Her mental state deteriorates to the point that the human leader Krauser has to confine her to a cell for her own stability, portraying her as a tragic figure broken by her encounter with absolute destruction. Despite her trauma, she survives to the end of the sequel, where she is last seen among a small group of refugees.

Regarding notable abilities, the information available does not detail any specific combat skills or superhuman powers that Vaiya possesses. Her primary strengths appear to be her leadership qualities and her will to survive in the harsh wasteland of Jerra.