I am an Auralen...I have the tremendous power to heal...and I have an even greater power to destroy.
Kari mulled over these thoughts as she walked away from Konoha. She had been studying the archives, learning everything she possibly could about Auralens. As the clan head had said, they had a dangerous and violent past. The most violent wars of ancient times had been because of conflicts between the twins born before Kari and Itachi.
It seems, one book read, that Auralen twins are almost always in conflict with each other. They have a natural tendency to grow in opposite directions from their partner. Auralens are feared more from the conflict they present than from their great power.
An Auralen has two major advantages in their power over light. The first is the ability to heal almost any wound or curse. They are able to manipulate photons to perform microscopic surgical operations that normal chakra users cannot attempt. This is especially useful for flesh wounds, punctures, and cursed seals or other markings resulting from a ninjutsu.
The second advantage is that these ninjas are able to create powerful ninjutsus because of their mastery of the fastest and most uncontrollable particles in the universe. Most of the ninjutsus are results of maniuplating light beams with chakra by controlling every individual photon in the beam. It takes a percision and intensity of chakra control that most shinobi never achieve. It is obvious that one can never become an Auralen, but must be born one. Certain readings in an Auralen's DNA give them the control over photons they need and even allow them to see these particles. The ideal parental match to create an Auralen is usually a parent with a special bloodline limit of the eyes and another with a bloodline limit of any sort of power within the skin cells. The latter is needed for the Auralen's stunning ability to actually collect photons and release them at will. It is very similar to collecting chakra and releasing it when needed. However, it is not always necessary to have this pedigree as several Auralens have been documented as simply having two parents with superior power in the eyes.
Probably the most fascinating thing about an Auralen is this: it is not merely the light beams they are manipulating that give them power, but their ability to blend chakra and photons into an energy source more powerful than the results of nuclear fission. Without percise control of this energy, an Auralen can end up killing themselves in their attempt to use a ninjutsu.
Kari had absorbed these facts like a sponge. She was fascinated by it all, but her mind was set upon the last words: that without absolute control over this power she had, she might die. She slowly lowered the book and looked ahead of her blankly. I might die... The thought was morbid and terrifying.
The girl entered her house and sat down. There was no one to train her in the arts of an Auralen. Everything she did would be self-taught and would be at great risk of her own life. But she had a little brother now. Itachi seemed completely uninterested in taking care of him. He had changed so much...now it was her duty to protect Sasuke. The only way for her to do it was to proceed and hope for the best.
Kari decided to start with the healing arts of an Auralen. It would probably give her the best training in chakra and photon control so that when she moved to offensive ninjutsu, she would be working with more solid ground.
She spent weeks learning how to absorb photons in layers of chakra around her body. She did exercises to build up her chakra stamina and endurance to ensure she would not lose control of the photons. When she would reach her limits of control, Kari would stand over pans of water and create needle-thin incisions into the water with carefully controlled photons. She would practice piercing different places on the water's surface and gradually made the incisions smaller and smaller as her control grew stronger. Kari then learned to use her Sharingan to see the surface she was piercing as she performed this surgery. She learned how to move her colums of photons and how to make them different lenghts as she moved them. Finally, Kari practiced using several photon columns at the same time.
After six months of work, her surgical technique was complete. She tested it on herself when she fell and scraped her thigh badly on a rock. Using her technique, she placed tiny skin grafts over the worst areas and concentrated her own chakra there several times a day. The wound healed in about two days.
Kari then learned how to perform more major surgeries, such as broken bones and open vital organs. She used the power of her own chakra combined with the percision of her photon based laser colums to repair damages done to the human body. Kari practiced on animals and saved several injured creatures she would find in her wooded backyard.
Kari studied the healing arts for two years and gained the perfect chakra control over light beams and their photons.
Now, years later, as she was preparing to leave Konoha and find Sasuke, she knew that those years spent on the healing side of an Auralen's power would be her best weapon when bringing Sasuke home.