(Here is a Rebel character. I might make a Empire one too. Let me know if she is a bit on the OP side and I can tone her down. I've tried to make as many drawbacks as I could.)

Name: Yuri
Alias: Rebel
Class: Kuniochi
Bio: Yuri is the last living member of the Kage(Shadow) Clan, a once elite, proud and very dangerous force of Kuniochi. They were one of the Empress of Astor's most reliable forces, often sent out a night before a battle to thin the numbers of enemy ranks and eliminate their generals making sure the coming battle was heavily tipped in the favour of the Empire. They were most often tasked with secret and highly dangerous missions, such as sabotage and assassination, but were even mobilised on the battlefield as an elite force.
Such was their efficiency, that the Empress began to grow rather cautious of her own force. Despite the Kage Clan's loyalty, the Empress grew to distrust them, discovering how dangerous the clan had become, able to end battles before they even started. She feared with such ability, the clan could easily turn upon her, and like they had with so many of their enemies, eliminate her key personel in a single night before coming for her throne.
The Empress allowed suspicion to get the best of her, and thus betrayed the Kage Clan, sending them on an impossible mission she had herself orchastrated. The Shadow Clan, proving their worth, managed to succeed what was thought to be impossible, but were ambushed by what they thought were allied forces of the Empire.
Having already suffered heavy losses in the name of the Empress, they were too few to hold back the forces sent against them. The few that survived the slaughter fled, but were gradually hunted down over time. Of a once great Clan, now only Yuri remains, and she seeks to join the rebel forces, in an act to gain revenge against the Empress and her Empire and avenge her clan.
Despite her background as a former ally of the Empire, the lone Shadow Clan member is still a force to be reckoned with, taking with her hundreds of years of ancient training and techniques from her former Clan. The Rebels found they could not pass up the chance to gain such a deadly ally.
Power/Abilities:-
Kuniochi Training - Yuri is highly skilled in hand to hand combat. She is quick on her feet, extremeley agile, nimble and highly trained in the use of a bow, small swords, shurikens and daggers. Yuri was considered one of the top members of her clan and as such has mastered the ways of the Kuniochi, capable of hiding undetected and unseen in the shadows, as well as being deadly in battle and combat where concealment is not the answer.
Kage Clan Conditioning - Yuri is in top physical condition, and has also been subjected to ancient Kage conditioning in order to become a deadly Kuniochi. Her body is scentless, giving off no smell or odours to help conceal her presence when required. She can also step and move without a single sound, capable of concealing her breathing and even her heartbeat. The drawback to this extreme conditioning, is that Yuri is mute, and that she wears no armour.
Maea Power - Yuri was blessed with a rather apt gift from her time when she was exposed to the Flower. With concentration, Yuri is capable of teleportation. Her body seemingly bursts into wisps of black smoke, only for her to appear elsewhere in the blink of an eye. Yuri can rapidly teleport, capable of attacking her enemies from near seemingly multiple locations, making her very deadly in combat, as well as being capable of fast escape. (Perhaps her power is the only reason she is still alive today)
Though a great power, Yuri requires line of sight, and cannot teleport where she cannot see. Yuri is also required to be free of thought to use her power. If in pain, or grappled, Yuri cannot use this ability as her mind will not be clear. If wounded, Yuri will be unable to teleport until she is healed.
Along with this power, Yuri has been granted fortitude, generally faster healing and peak human strength, along with the rare and unusual longetivity of life.