Blood Manipulation
Blood is dynamic. Always producing, always changing. Physical and biological, it carries with it many properties that make up a person. It is the flow of life within the body, that which circulates so many things, good and bad. Nina has the ability to manipulate blood, both on a biological level and as a physical entity. This extends to the bone marrow in her bones which produces her blood and some of the circulatory system.
Biological Control
Manipulation of blood on a biological level is fairly limited. She can not completely remove any foreign contaminants in her blood (such as vemon or poisons or alcohol) she can isolate such contaminants in a specific part of her body and physically flush it out through a cut. She will always be aware of substances within her blood, level of oxygen, level of waste, and level of foreign contaminants.
What she can control on this biological level is the production of blood (her bone marrow's stem cell replication rate), and the amount of certain things within the blood. She can cause the blood to clot faster, break down clotting within her body, circulate faster or slower to raise or lower her body temperature or slow the movement of foreign substances, and she can control her white blood cell count to an extent, raising or lowering her immune system and helping her deal with diseases and injuries and control blood rejection when she takes in an incompatable blood type. She can also alter her blood chemistry to an extent, allowing her the potential, with time, to completely change her blood type at will from one type to another, basically causing a natural bone marrow transplant. Taking DNA directly from her blood will give some awkward results when compared to saliva, hair or skin.
Circulation
Along with increasing her own blood production within her bones, she also has an increased blood storage. Her body is capable of holding 50% more blood than the average person (7.5 liters). She has less fat tissue to make up for her the additional levels in circulatory system, and her body weight when she's at "full capacity" is about 8 pounds heavier than it would be in someone else of her size and build. She also has a the ability to control her heart beat, slowing it down or speeding it up upon will. Her heart continues to pump as normal without her, but she can control it with concentration.
The easiest thing for her to do is regulate her circulatory system (her heartbeat, the blood flow). She can do that without much strain to herself or her body. She will also never suffer from blood clots for any natural reason.
Blood of Others
Within other people, her manipulation on a biological level is lessened even. She can not alter the substances within the blood other than to cause the blood to clot faster while exposed to oxygen (only on the surface, not within the body), or slower in a person. She can break down blood clots forming within someone's system, thus actually helping avoid heart attacks and strokes, rather than causing them. All other changes are limited to blood within her own physical body. She can make herself aware of contaminants within the blood, ailments, diseases, and blood alcohol level. She can also make herself aware of the person's blood type. When she takes the time to examine someone like this (it takes a few minutes and very close proximity and visible blood) it keeps her from taking in bad blood, more often then not, though she can get sloppy.
Physical Manipulation
The most common and visible use of her ability is the physical manipulation of blood outside of the body. In this case, she or someone else, will need to be bleeding. The blood must be fairly fresh out of the body, so she's of the habit of quite literally cutting up her own arms in order to use this ability. She can use blood much like a hydrokinetic would attack with water, threatening to drown someone, blinding them, gagging them with the smell. But she has the added ability to harden the blood, drawing on the natural ability of blood to clot, and ramping it up a couple hundred times.
The blood can be hardened partially, allowing for mentally mallable ropes of blood that can lacerate or whip, or it can be clotted beyond the density that blood would be capable of. She's only capable of hardening blood outside of the body, in open air (can't do it underwater). The formation of this blood can take the shape of daggers, knives of swords, with the strength and possible sharpness of steel. When they're hardened completely to the level of steel, she must physically handle the items in order to use them. She has to handle them herself, throw them with her own physical strength and accuracy. She can no longer physically manipulate fully hardened blood.
Their volume is dependant on the amount of blood she's using. She could easily create two decent sized daggers out of her own blood and replinish it enough to keep from passing out, but creating two swords would probably cause her to be weakened. Using other people's blood with her own would make for larger weapons.
Unhardened, her blood can seep through cracks in walls, go under doors, through keyholes. She can not form complex items with her blood (or the blood of others), such as keys or moving parts, limited to sharp pointies and moveable whips of blood. However she can solidify blood within cracks and weaken or destroy solid objects. She could break a lock on a door by seeping blood through the cracks and solidifying it to the point of steel.
She can also use blood as a shield, putting a thin layer of it around parts of her body and solidifying it to act as a kind of padding. It offers limited and spotty protection about the level of kevlar. Normal bullets may not puncture, but they would knock her down and possibly unconscious at impact.
Once solidified, she can not de-solidify the blood to reshape it or use it again.
Blood Draining
Using the blood of others for outward manipulation is an easy reality. It must be fresh blood in order to be used, and can be combined with her own blood at the same time. But she can also draw blood out of a person's body through cuts that they may have experienced. The deeper the cut and the more potential it has to bleed, the more she can forcefully draw out of a person. For example, a cut that doesn't puncture an artery will not bleed very fast under the worst conditions, so she will only be able to draw a small amount more than she otherwise could have. A wound that would bleed profusely will be much more of a danger to her victim.
A direct puncture or tear to a major artery is the biggest danger. If given time and left unchecked, she can, quite literally, drain a person's body of blood. It would take her ten minutes to completely drain an adult body of average height and weight. Less time for children or smaller people. In order to cause damage to someone, she doesn't need anywhere near that time.
After three minutes, the person would start looking pale and feel cold. After four minutes, their mental state would start to suffer severly, and they would begin to go into shock. After five minutes, with half of their circulating blood gone, they would be doomed and on the way to dying unless their blood is replaced. She can keep blood fluid and retransferable, even while exposed to oxygen, for a total of ten minutes, so she could theoretically empty a body to the point of death, and then give them their blood back. She can also completely switch blood from one body to another, but that would take a lot of time.
Note: For the sake of yeck, there are certain kinds of bleeding that will never be explored in RP. The IC explaination for why it will never be abused is that she's a woman and she's not going to touch that.
Transfusion
Blood she has stolen can be mixed with her own and even drawn into her own body. There are limits, though, and the most important limit would be blood type. While she has the capacity to change her own blood type to accept that of another, specifically using the stem cells of another person's blood to change her bone marrow over time, it takes her a week to do it, and it should only be done under drastic situations. She can control the white blood cells to limit the rejection of the blood until it is utilized and replaced, but that will have the effect of making her physically weaker and ill, depending on how much blood she needs to replace.
Because she relies on replicating her own blood, she needs to constantly replinish her fluid levels after losing blood. She drinks more water than two people would ever need to. If she uses her ability to manipulate blood in a physical way, she also tends to get hungrier than a normal person, requiring her to stop and eat twice that a normal person would. Though she can replicate blood much faster than a normal person, she can still suffer from effects of blood loss when over-using the physical manipulation aspects of her ability.
If she ever opts to change her blood type spontaneously, she'll require a week of bed rest with very limited ability use during that time. During this time she is most suspectable to contamination within her blood. At the start of the game, her blood type is A+, making her most compatable to A-, A+, O-, O+ and incompatable with B or AB. In order to be the most effective with her ability, she would need to change her bloodtype to AB+, but she would need to take in the blood of someone who happens to be AB+ to do that.
