First time trying this so bear with me please.
(Name her sensei gave her because she doesn't remember her real name.)
Age: Guesses around 23 or 24
Skills: Stealth, strength, speed, just to name a few. She knows every known and unknown martial art in the world. Unrivaled in swordsmanship and master at breaking in to just about any place and anything.
Abilities: In addition to her lengthy skill set. She also has supernatural abilities. Her main one is the manipulation of shadows and darkness.
Shadow portals: can manipulate shadows to create portals to other areas as long as there is darkness there.
Dark ball: can create slicing orbs of dark matter to attack with if her sword is not with her at the moment.
Dark feed: can absorb the energy of the negative emotions of her enemies such as hate, rage, and fear to replenish her energy.
Total darkness: can completely darken any lit areas.
Regen: She has an abnormal immune system and healing abilities that are similar to wolverine's. She never gets sick and heals at an excellerated rate making her almost impossible to kill.
These are just a few abilities that she knows about and can control. She doesn't completely know what all she can do yet.
Weaknesses: She can't stand to be out in direct sunlight for more than 20 minutes uncovered. Her skin burns and breaks out into rashes and it weakens her and makes her sluggish.
She also can't use her dark powers a lot because it wears her out too fast.
Backstory: She doesn't remember anything about her past. She doesn't know her name, age, nothing. The only memory she has is watching, who she assumes was her family, being brutally murdered in front of her. The only time she begins to remember anything is when she was found by Master Guan when she was probably about 7. Master Guan took her in and trained her in every martial art known and unknown to man. Including how to control her abilities with darkness and exorcism. She has these abilities due to the remains of a demon that attempted to possess her, but due to the remains she has no heart and no emotion. She runs solely on logic and the logic of emotion taught to her by Guan. She can't use her dark powers a whole lot either because it wears out her energy and her resistance to the demonic soul that she now has, so she uses her sword and knives to do most of her fighting. She wears an enchanted gauntlet that helps her to control her dark powers and help keep them from overtaking her. There have been few times that they have and she becomes a monster demon/human hybrid of sorts that is completely out of control and destroys everything and everyone in it's path. She has dark circles under her eyes due to sleeplessness caused by the same reoccurring nightmare of her family being murdered. She now works as a paid assassin/bodyguard for some of the biggest crime lords of the underground, while continuing Guan's work of searching and destroying the demons that possess humans and wreak havoc on the living world.