Once a woman named Jin Ae, Immemoria is a villainess exerting the power to open up old wounds and damages both physical and mental to living and inanimate objects. This of course requires the target have suffered damages already, lest her abilities turn out useless. Immemoria summons black orbs to do her bidding, their touch engaging the effects of her true abilities. Should an orb pass through an individual, prior damages to the stricken area return from the past, along with the pain that was associated with it. Cuts open up, bruises darken, and sicknesses afflict the individual. Mental harm from the past returns as well, plaguing the victim with memories of old problems, sadness, and despair, whatever the incident might have been. Furthermore, these wounds are expanded upon, becoming even more dire than their original occurrence.
Jin Ae was a nurse prior to the Awakening, instead using her skills to heal victims, rather than to harm them. She had always intended to do what she could for the world, idolizing the mundane heroes of yesteryear, but never quite had that 'oomph' to grow into a doctor. Jin Ae settled with being a nurse, ultimately, and she was satisfied.
When the Awakening had occurred, Jin Ae was left with a disparagingly contrasting set of skills; the ability to enact harm, and the skills to repair harm. She could not understand why such horrible powers were bestowed upon her, given the superheroes she had seen arise from the Awakening as well. They had received powers oftentimes related to who they were, or what they did and enjoyed. Jin Ae, on the other hand, was the brunt of some cosmic joke.
Regardless, she coped with their effects, saving them for only the most vile of individuals she encountered as 'Immemoria'. During an incident involving a group of rapists at large, Immemoria utilized her abilities to their utmost, scarring the culprits in more ways than one. The men were left torn to shreds mentally, and another hero arriving on the scene (one with a much more 'heroic' outlook on his job) decried Immemoria's methods. The event was made public, and due to the novelty of vigilante heroes in the world, it was difficult for supers to get off easily. Jin Ae was imprisoned for her, "Cruel and unusual punishment," upon the culprits, guilty as they were. Mulling over inside her cell, Immemoria reflected upon the scene that had landed her where she was.
The thought of how weak, how fleshy, and feeble the minds were of those rapists repeated itself over and over in her head. It seared itself into her brain, warping itself as more and more ideas of her superiority fueled the fire. Images of those she had seen rolled into urgent care played on a loop, furthering the characterization of weakness in the body.
The years in her cell had shifted her mind in a worse direction, and with her release, Immemoria concluded in her madness that the reason she was given such horrendous powers was because, simply,
she was destined to become a villain. The human beings, as she began calling them, were but the wall blocking the Awakened's path towards domination. Immemoria sought to join the Novus Sapiens, believing in their desire for a superhuman-ruled world.