Cassandra Cain
The daughter of David Cain and Sandra Wu-San (Lady Shiva), Cassandra Cain was conceived and trained from birth with the intention of creating the perfect bodyguard for Ra's al Ghul. After many unsuccessful attempts to train children from birth in martial arts to make them inculcate it like a native language (the most successful being the Mad Dog), David Cain, then a member of Ra's League of Assassins, decided the right genes were necessary to create this "Who Is All". With Ra's go ahead, Cain searched for the perfect mother for this child, finding her in the Wu-San sisters of Detroit, who practiced martial arts with each other nearly every moment of their childhood in a type of sister's language. Cain sympathized with the younger sister, Sandra, when he noticed that she held back out of love for Carolyn. To "help" Sandra reach her full potential, Cain murdered Carolyn, then lured Sandra into an ambush by the League of Assassins, where he defeated her. Cain spared Sandra from death on the condition that she bear his child, and leave her for him to raise. Awed by the potential heights she could reach in her physical talents now that Carolyn was gone, Sandra agreed to Cain's bargain in order that she might go on to become the unstoppable force of nature known as Lady Shiva: creator and destroyer. Shiva's hope for her child was that she might one day grow to be the force that could stop her reign of destruction.
Cassandra spent the next nine years homeless, guilt- and fear-ridden as she traveled the world. Entering Gotham City at 17, Cassandra came to be of Oracle's agents in the No Man's Land of Gotham City. After saving Commissioner Gordon's life from her assassin father, she was given the Batgirl costume with the approval of both Batman and Oracle. She became Barbara's ward and in a sense, the Batman's adopted daughter. As the No Man's Land wore on, the new Batgirl was introduced to the rest of the Bat-Family with varying levels of acceptance. Usually acting as the Batman's watchful eye, she was finally allowed to go on a solo mission when a petrol station needed guarding against a local gang. Near the end of No Man's Land, Batman noticed her death wish and forced her to make a decision between suicidal actions and self-preservation. She opted for self-preservation.
Despite her notable handicap of being unable to talk, read, or write, Cassandra did remarkably well. Capable of understanding others' intentions due to her ability to read body language she was a more than a capable listener, despite the fact she couldn't process their words or reply to them. It was this trait that made her one of the Batman's most loyal and trusted followers and helped her to survive when the Bat-clan became hunted by the Bloodhawks. Although the fact that she couldn't talk frustrated Barbara Gordon, she proved herself useful in other ways during a team with the spectral vigilante Ghost in tracking disappearing corpses. The running successes and final understanding of her mission as Batgirl allowed Batman to give her the privilege of running solo in Gotham City on the condition that she faced no 'costumed criminals' (Joker, Bane, Two-Face, Penguin, etc)
From going undercover in Madras with Batman to saving local heroes from the mob, Cassandra continued to impress as the new Batgirl. Especially when, despite Batman's warnings, she went face to face with a meta-human and won. She even managed to, despite her restriction to Gotham City, make it on the reserve member list of Young Justice.
But Cassandra's career was not the only thing that was growing. In the background a rift between Oracle and Batman was slowly emerging, as was the growing image of Batman as a father figure in Cassandra's eyes but the major development was David Cain's intentions to get his daughter back.
Batman learned about Cassandra's past when Cain sent a tape depicting Faizul's death to the Batcave. Nevertheless, Batman continued to accept Cassandra. Things became more strained when a run-away psychic altered Cassandra's mind so that she could understand words. As a side effect, she lost her ability to read body language and thus, her ability to fight properly. After she almost died while trying to protect the psychic from assassins, Batman took away her costume and began retraining her. The training remained ineffective, however, in part due to Cassandra dwelling on her lost ability instead of focusing on learning all over again, and Cassandra wanted to roam the streets, with or without the costume.
It was during of these 'unauthorized' vigilante outings that she encountered her mother. After Shiva attempted to kill a wealthy young girl, Cassandra intervened but was swiftly knocked out. After waking up, she immediately tracked Shiva down, despite having a dead arm, to find out why she spared. Shiva explained that she came to Gotham to lure her out and fight her, and left when she felt Cassandra was no longer a challenge.When she explained why her skills were lacking, Shiva recognized her Cassandra's missing skills and offered to train in a way that will allow her to possess them again. In exchange, they would fight to the death in a year. Knowing she had no chance of winning, but wanting her skills back, Cassandra accepted.
