Name: Kira ["No translation known." Koto says that it means "Death Bringer".]
Appearance: Koto's appearance doesn't appear to change with the use of Kira. However, if one were to remove her gloves and socks/shoes, they would see that her hands and feet have permanently turned a gradient from her normal skin tone to various shades of gray, up to a splotchy gray/black combo at her fingertips and toes. Occasionally, she'll also go through an odd growth spurt, which is actually her power further negatively effecting her body, causing her bones to stretch, muscles and ligaments to rupture, and her cells to become very active, causing her skin to adapt to her new body size and her hair to grow at a much faster rate as well. This process is extremely painful and leaves her prone for up to three days, depending on how much she grows. If someone was able to clearly see her aura, they would be able to note it's irregular, fluctuating appearance, due to the usage of her life while attacking.
Ability: Koto can shoot energy at her opponents focused through the tip of her right index finger or fired more broadly and less stable from her entire hand, thrust palm out. This energy is is actually small fragments of her life energy. Each use shortens her life a little every time. If she can hit accurately, Koto can actually damage her opponent from the inside out. She can easily break bones or crush organs. However, her power isn't completely destructive. "Kira is able to control the victim's circulation, if you cut it off, the victim will die. Conversely, it can strengthen the victim's chances of survival." Simply stated, Koto can use her power to stimulate a person's system into a lesser state of her own hyper healing, which is covered below.
Kira also grants Koto super fast healing. Depending on how much damage she's taken, Koto can be healed almost instantly, anywhere up to a full day. Life-threatening injuries can take up to two days to completely heal. However, healing time is doubled if she is fatigued from usage of her power.
Techniques: Koto has no techs. Her ability and martial arts are the only thing she has going for her in a fight.
[Note: All techs have been sacrificed for this power, so go easy on me. XD;]