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Nyssa Raatko is the estranged daughter of Ra's al Ghul and the younger sister of Talia al Ghul. In The Season of Infamy Side Mission, Shadow War, Nyssa lead a rebellion against her father and those loyal to him so that she could take control of the League of Assassins.
Arkham Origins Incident
Before Arkham Knight Incident
At some point, both Batman and Alfred Pennyworth came to know of Nyssa. Bruce memorized her appearance. Alfred developed the opinion that Nyssa was the most reasonable member of her family.
Following the death of Ra's al Ghul in Arkham City, Nyssa began leading one of the two warring factions of the League of Assassins. Seeking to atone for the sins of her father, Nyssa's rebel faction did everything in their power to prevent Ra's loyalists from gaining access to the rebel's Lazarus Pit.
Arkham Knight Incident
A tape recorded by Ra's Al Ghul could be found in Elliott Memorial Hospital. Recorded just prior to the Arkham City crisis, Ra's Al Ghul bequeathed the responsibilities of the League to Nyssa's sister Talia in the event of Ra's death and Batman's refusal to join. According to Ra's, Nyssa could not be trusted with the leadership of the League as she was considered to be too soft.
While guarding the new Lazarus Pit, Nyssa was forced to confront Batman, relieving him of his detonator which was primed to destroy the Lazarus Pit. Nyssa warned him not to complete her father's resurrection. Nyssa then detonated the explosive gel, destroying the Pit and helping make her point. Nyssa told Batman that if he let Ra's die, she'd swear on Talia's grave that the League would never take the life of an innocent again, and would never return to Gotham. She then threw Batman's detonator back to him. A conflicted Batman left the pit, with Nyssa watching him closely.
If Batman chose to complete Ra's resurrection, Nyssa sent her rebels to attack him, before she was struck down by her newly empowered father. Batman offered to help, to inject her with the remaining Lazarus, but Nyssa refused, and had no intention to turn into the same monster as her father.
If Batman chose to destroy the Lazarus device, Nyssa helped in the defeat of her father's loyalists before she attempted to kill him personally. Batman convinced her to stay her vengeance, and Nyssa reluctantly agreed. Nyssa then fulfilled her promise, and abandoned Gotham for good to hunt down the few League members who still followed Ra's.
Long the black sheep of the al Ghul family, Nyssa is the youngest daughter of Ra's al Ghul and the younger sister of Talia al Ghul.
Nyssa Raatko has been noted to be the most sensible out of her family, notably Batman appeared to trust her word immediately as opposed to Ra's al Ghul and, to an extent, even Talia. Even Alfred believed her to be the most honest out of her family. Depending on the choice made, Nyssa does indeed willingly keep her end of the bargain and leaves Gotham for good.
Nyssa was also known to disagree with many of her father's decisions. While Nyssa respected her father's philosophy, she did not approve of it, believing it to be outdated and too extreme. Believing that there were alternative and more humane ways to save the world, she became notably more distant from her father and sister over the years eventually leaving to pursue her own path of saving the world. Many of the members of the League were not even aware that Ra's had another daughter.
Nyssa was also noted as not liking taking orders. In the rare event that she was forced to follow her father's policy, she often used loop-holes and/or double meanings to make her own decisions and going about it in her own way. Despite all this, she was willing to kill if it meant preventing anymore casualties or if there was no other choice.
With regards to her relationship with her family, Nyssa appears to have had a simple sibling rivalry with Talia, likely due to Talia's legitimate right to lead the League of Assassins in the event of Ra's al Ghul's permanent death and his preference toward Talia. Nyssa mentions once that Ra's al Ghul was an abusive parent to his youngest daughter, while at the same time, spoiling Talia. This treatment would make Talia arrogantly believe in her own superiority which would eventually lead to her ultimate downfall and death. Because of this, Nyssa fully believes that Ra's is just as, if not more so, responsible for Talia's fate in Arkham City than the Joker.
Despite her often jealous rivalry with Talia, Nyssa did greatly care for her sister and was deeply saddened by her seemingly permanent death. She was also aware of Talia and Batman's secret relationship and while she might not have approved of Talia's feelings towards the Dark Knight, she nonetheless respected them and willingly supported them in their decision. She was notably the only other person besides Bruce whom was known to have mourned Talia.
Nyssa's relationship with her father on the other hand was completely toxic. Unlike Talia, who greatly respected Ra's al Ghul, Nyssa saw him for what he truly was and despised him for his harsh and often unfair treatment towards her, and to a lesser extent, Talia. This resentment would only grow as Ra's mental state further deteriorated from his repeated resurrections. Despite this, she did care for him enough to pity him for what he had become believing that he had been a good man once and that he should've been allowed to move on centuries ago. Nyssa was even willing to show him mercy by putting him out of his misery believing that it would be preferable to spending his last remaining days weak and alone.
She was perfectly willing to call Batman out on his flawed rule. Calling him a stupid fool and a hypocrite for believing that blood wasn't on his hands just because he wouldn't kill. She nonetheless respected him for his skills and his relationship with Talia.
She was also implied to have a vengeful side, as she mentions that the Joker has no clue just how lucky he was to have died when he did as she would've tortured him in the slowest and most painful ways possible.
Despite having been trained personally by her mentor and friend Shiva and becoming an extremely skilled warrior in her own right, Nyssa was constantly looked down upon by her father Ra's in favor of her older sibling Talia whom he saw as having more potential.
Nyssa was also shown to be extremely intelligent, having gone further in her research on the Lazarus Pits and their secrets then anyone else alive, including Ra's al Ghul and Batman. Above all, she believed in the necessity of death believing it to be a natural part of life and refused to use the Lazarus Pits to save herself not wanting to end up like her father.
Nyssa had a great resemblance to her older sister, although her features were sharper and her hair was shorter and darker. Nyssa wore a more armored variation of uniform that was worn by her rebels, although it had the same purple color-scheme as Ra's loyalists. In her initial conflict with Batman, Nyssa wore a black face mask.
Game Over Line:
- "I gave you a chance Bruce. A mistake."
- Her name, in Arabic means "Woman". Although her name is spelled as "Nyssa", the actual spelling is "Nisa."
- Nyssa, along with Ra's, were the only three major characters in the Arkham series to have a Determinant Status, where one of the choices would either result in Ra's killing her or she leaving Gotham for good after trying to kill her father. The others would be her father Ra's and Azrael. Ra's can end up being mortally wounded by Batman and apprehended or resurrected by Batman and killing Nyssa before disappearing and Azrael can end up in prison or an ally of Batman and leaving Gotham to destroy his order.