Who is she?
ITS X23!
But seriously...
This character was created in ...2001 i beleive? Tell me if i'm wrong. I've got "The killing dream" in her own series and a few other comics featuring her but i'm still working towards getting more on her back ground.
From what i know:
When Wolverine escaped weapon X the idea of a mutant killing machine didn't follow. Thus, scientists used his DNA to create a female clone, born by Doctor Kinney of their department.
As you can see here: Wolverine. X23. They're pretty alike.
She was raised, and i'm guessing she was pretty much treated like an animal. Forced into killing, alot, and alsorts. Her mother was weak from my veiw, and the only thing she ever did for her "daughter" was read her stories; such as pinochio (she isn't a real girl, so that kinda does have a point to it.)
Turned out that when wolvie escaped weapon x, he killed basically everyone: including the scientist "Dale Rice". Decades later Rice's son Zander picked up where his dad left off. Their main plan: Clone wolverine and use his clone as an assassin for hire.But. There is always that but... their genetic material was damaged, the Scientist Sarah Kinney could only salvage the X Chromosone, so she created a female clone.
The 23rd embryo was viable and Sarah was put into serving as the surrogate mother for the project: "X23".
The clone grew up in the facility and was dehumanized to keep her from gainig a sense of self. A the age of seven she was put into martial arts training. Soon after weapon X developed a trigger sense inside her that would go off and send her into a crazy killing spree. She developed claws in her hands, but unlike wolverine the middle one is on her feet. The facility coated them in admantium. (In case you haven't seen Xmen origins: wolverine....the admantium process is NOT pretty).
Zander hated wolverine and took it out on X23. he developed, what the timeline in the bacl of X23 vol. 1 calls "An indesrtuctable sadist" called Kimura, who punished X for any mistake. Including the tiny ones. X began to cut herself, but naturally her healing factor fixed over this.
Her combat and spy training intensified and her first mission was taken out with ease as she assassinated the presidential candidate Greg Johnson by posing as a disabled child.
For 3 years X killed targets all over the world. She had no emotion. No moral, or feelings towards right and wrong. She was like a machine, basically. She became one of King Pins Fav. assassins. But on a mission oposing AIM's lab Zander left her behind, and the AIM troops nearly killed her. When she finally did make it back, Zander lied and KImura punished her (agaaaaiiinnn). Sarah learnt that her neice was missing and got X to help her find her by breking her out. Zander was PISSED.
Zander gave her a few more missions of his own accord, her mother was horrified. They found out that Zander had begun Gestantion of the embryo's X24 and X50. Her mother gave her a final mission: destroy Zander and the embryo's.
X beat the living crap out of her lifelong tormenter...anf BADLY. She left him for dead. Then blew up the lab. But Zander had planted a trigger sense in Sarah. When X came out of her berserker rage her mother was bleeding in the snow: but she finally gave X a real name... Laura.
X went to live with Sarah's neice, who she had previously helped: Megan, and her mother Debbie, but Debbies boyfreind was a facility spy. He dosed her tea with trigger sense, and spilt it. She killed him.
Kimura showed up to their house and X sent Megan and Debbie away with fake ID's. Then she saught Wolverine out and they fought until she calmed down. Then captian America showed up and arrested her for multiple murders. He soon realized she was just another victim and let her go.
She was lost on the street and working for a pimp "Zebra daddy", doing tricks for guys whho liked to be cut. Then one (John) killed himself, she was blamed, ran with a group of others and killed everyone including Zebra daddy who came after her.
X killed some gangsters after a freind of hers and go dumped in Xmen's custody, though she desperatly needed social work.
After M day Wolverine convinced her to come back to the Xmen, but she scared most of the remaining students. Hellion and Miss Frost were particularily mean and Frost wanted her gone. But when it came to deciding on the new Xmen Cyclops maded sure she made the cut.
Featured in this New Xmen volume.
Reverend Stryker bombed the school kiling 42 former mutants and saved her roomate Dust, then also prooved that the sentinel NImrod was with Stryker. X was badly injured so Hellion got her to Elixir the healer. She started to develop a crush on hellion.
Things went along from time to time mission to mission with the Xmen. (She joined Xforce as well but Wolverine changed his mind at the end of the crisis when Hope returned so she could be herself and make her own decisions. )
At one later poitn the facility recaptured X and Kimura cut off her arm. BUt later he berserker rage was triggered and she killed everyone, except Kimura who got away. Her arm grew back and she had her admantium replanted.
Currently X is inher own series, Beggining with "X23: the kiling dream" as she goes about her "life". Note this first comic is where all my facts are coming from.
Power notes: X has hightened healing (possibly better than wolverine because she had oftern said to him "you heal too slow", Acrobatics, Admantium enlaced CLAWS so skeleton unknown if it was really done like wolverines, She is freakishly well trained, thorough, merciless, and has her trigger sense. She has hightened everything, and though she is much like wolverine, not quite the same. She has a claw coming from her toe (i love the move she does on Rockslide in the big battle in The new Xmen pic i featured somewhere, she flips over and buts his arm off in two places with her feet. NIIIIICEEEE) and two from her hands. In ways she might actualy be stronger than wolverine. Note to self...i must have to set up a debate on that!
PEOPLE WHO READ THIS: MIND BATTLE TIME! WHO WOULD WIN? X23 vs WOLVERINE!
Now just to be nice...
Let me add in a few images below of X23:
X in her "berserker killing mode" from trigger sense.
Her claws.
Full pic of her from new xmen volume 2.
X when she was young.
X23 with hellion.
X with Zander's creation Kimura.
Cover to "X23: the killing dream". Good stuff, i liked how there was a big detailed timeline about her written from Wolverines veiw. The story was not quite as good as I had hoped though. I'm a big X23 fan and she need to not be...how to I put this... Wuffified...she is kick- ass tear- your -guts- over- the- floor brilliant. Let her be who she was vreated to be rather than searching for herself. Wolverine doesn't fight it. Let her be 50/50!
"women of marvel" pic. Seen this one around a few times... at the back of some other comics i think...
X and her new partner Gambit in her own series talking about death... the pair of them ar so calm about it i love that!
X and gambit. This is a fairly typical cover when it comes to the claws.
Dear world:
Meet X23.
Thats the name. Don't wear it out.
This i brilliant.
The Joker...
This lady,,, aka Raven Darkholme...
Action figure NOT included. And no, I don't do action figures. I read stories and make up my own in my head, not play it out with comic book character figures.
Evil Raven. She is a hybrid, deamon/human and often goes bad. SHe can't help it and when she is in control you only ever see her hurt deamons. She cries alot when she knows how too as well.
These guys all used to be good. After Jason *red hood* got reincarnated he went bad. After red arrows daughter died he went into a druggie frenzy followed by going bad. And Starfire...was unexpected but due to the last story line in "Titans" she was going agro as. 
A genetically engenered killer gone good.ish. She has her ways...
This *skank* started bad but ended out with Xmen (and in Scottys bed)
Overall a good guy working for his race but...well... read the comics. Y'know. Once again he has his way. 
When ever Lexie darlin' daddy *half* flicks a switch superboy goes all badclone.goodclone. on the teen titans. Only happened once though. Then he died.
Catwoman started bad but she went good.