Could you do a personality reading/analysis on Nurbanu? Her development, crucial points in her story. Also, do you think she truly loved Selim or only cared about becoming a Haseki and then working towards becoming Valide Sultan? Early S4, we see her asking Canfeda if Selim is going to become Sultan, which raises the question if she was plotting for her own benefit or actually fell for Selim?
I find Nurbanu to be a character ripe with personality, despite that she only has a single season of material. Just like with Selim, or perhaps even more so, I find what was done with her fascinating. She's the second character that follows the general pattern of a "SOW" arc and it's interesting to see how much she parralels and differs from that arc.
While Hürrem starts out on the ship that was going to the Ottoman castle, we meet Nurbanu already there, standing right in front of the doors outside; sharing the same fate as the others next to her, yet it looks like she's entering there like an external witnesser of a whole other culture. But she hasn't forgotten who she is. She's used to a fairly calm life she looks very much proud of, the life of a Venetian noble woman with dignity and pride, and that is suddenly snatched all away from her. She justifiably resents those that have done this to her. She wasn't willing to go through the harem life at first, so she wanted to take her own life. I feel this comes from her genuine hopelessness that overtook her in the beggining, the situation she was in might have been way too much for her. After all, she isn't faced solely with a sense of lost identity, her current position in the harem is the exact opposite of what she was meant to do before. But after she was saved by Selim, it was perhaps then she decided to fight and survive in her curcumstances.
That said, while it may be result of her more condensed development, I always remain surprised of how fast Nurbanu found out what exactly she had to do to go on top. Maybe I shouldn't, since part of her motivation may come from not only her natural instincts, but also her will to return to the closest equivalent of her previous position once again, but the way she orients herself, how quickly she tends to react, the way she decides exactly how to act following both instinct and logic. I really like that about her. She reacts so well in tense situations, knowing which buttons to push to get the wanted effect in all her interactions with Hürrem, Selim, Canfeda, etc. It's telling of how much one particular event can change a person, opening up traits and qualities one may not have previously demonstrated. And for me, Nurbanu is one of the best examples of this.
Her "tertiary character trait" is very unique for the show, and overall: her ability to read the stars is amazing on its own and should be more appreciated, but the way it complements her character makes it even better. It's like a consitent guide for her: whether she's going on the right direction. And when she sees she's supported by fate itself, she gets even more of a push to rise up in the hierarchy and pull a victory. I loved the scenes where she went out to see the stars and where she told Hürrem of her future - they establish a lot about her. I only wish we saw even more of it. (I feel that ability of Nurbanu's works pretty well in a thematic way, as well: it enforces even more strongly that times/eras change, just like the positions of the stars change. And the motif of changing eras is major for her future conflict with Hürrem and the SOW, as a whole.)
Nurbanu also has a very psychological side of hers that was key in helping her realize what exactly Selim needed to get the motivation necessary to fight for the throne. She so often understood what exactly he needed and what had to be done, making her a voice of reason for him that could give him her word of advice. And that evolved even more as time went on: first she helped him to stand on his feet, then both of them made plans on how to get further ahead in the game, in conjunction with her own rise in the hierarchy. Even her provocations (mostly towards Huricahan, but Hürrem too later on) seemed more intentional than anything even when they weren't. Most of the time, she knew where to hit and what to say.
Even though she had a tendency to work more alone and had the intention to rise to power from the start (similarly to Hürrem), I think she fell for Selim. Wanting power, knowing what you need to do to get it and still caring for the person next to you that advances your power aren't mutually exclusive things, especially not in that time period. Maybe all Nurbanu felt for Selim was gratitude for saving him at first, but when she went to Manisa, she did come to love him eventually. She felt jealousy anytime he touched other women and always strived to comfort him in his problems and I don't think it's solely out of manipulation, knowing the core of her arc.
For me the major goal of Nurbanu's character development, her gaining more agency to fight her way to become Valide Sultan aside, was her slowly and mostly letting go of any possible scruple left in her in order to win- letting go of her more human side. We see in many instances in S04A that there's much humanity left in her and sometimes she isn't ready to do cruel stuff, even if asked to and no matter how much she wanted to adapt, she didn't realize how far exactly did she have to go to achieve her goals until a certain point. Because Nurbanu is a very patient character that goes more "one step at a time" in Manisa. She's focused on one certain aspect of the goal that contributes to the bigger victory: first it was to go to Manisa, then to win Selim over, then to make sure no one stands in the way, then to help him get advantage, then to grow herself, then help him defeat Bayezid, then erase the obstacle of Defne, as well, to become Valide, with little to no break in between. And sometimes both her own mistakes (like beating up Huricihan) and the system's cruelty (like Mustafa's death) tend to surprise her and go to paths she didn't expect to go otherwise.
I summarized most of the major story beats in her development (and talked a bit more about her in general) here, but I'll delve into them more. Her relationship with Hürrem demonstrates the best of Nurbanu coming into her own. It's not to be denied that Hürrem was the one who gave her a head start with giving her the name and sending her to Selim's sanjack, Nurbanu's arc began with her being loyal to someone else. But she's just as brave, ambitious and determined as Hürrem and for that reason their paths were always meant to separate. Nurbanu wanted for her own time to come, not to be bound by someone else, hence she isn't one that would blindly follow orders. From the beggining she had her own compass and instincts she would follow and that slowly made her clash with Hürrem, who envisioned Nurbanu as someone loyal to her first and foremost. The distance also helped in separating them, with them only sending letters to each other, when Hürrem was doing her own thing in Topkapi, while Nurbanu - in Manisa, both working for different goals entirely. The first challange of her loyalty she faced was also connected to her humanity, to the demise of someone close to her. Even though she obeyed the order (albeit more accidentally), she swore not to repeat it again and her remaining loyal was put at doubt right then and there. But what sealed the deal was Huricihan, where I feel Nurbanu got completely disappointed at Hürrem not wanting to cover for her, which is why she put out that ultimatum in the first place. Even then Nurbanu was surprised to detach from her completely, even though the hints were there before. I don't think she truly expected for Hürrem not to support what she worked for with Selim in the end, because it was only natural for Nurbanu to help him fight, not only preventing and covering his mistakes. Turning against Hürrem was more of a necessity for Nurbanu - she knew where she came from, but she was ready to fight for her position, even if it meant fighting against Hürrem herself. She was careful enough with her before they became full on enemies, though- she asked her for help when Selim messed up in Topkapi, she was reporting to her about the progress in Manisa, she showed the necessary respect for Hürrem. But that appeared to be over when she stole the ring, the symbolic demonstration that now, the power is in Nurbanu's hands - that's the truth and that's the future, no need to lean on the past anymore. And it's the main thing she would capitalize on now.
Her humanity shone most in two personal aspects of hers: her relation to Nazenin and her fight with Dilşah.
Her relation to Nazenin is probably the clearest showcase of her old ways she's still letting go of. Once they arrived in the harem, Nazenin seemed to adapt way faster; their dynamic changed to a point they were already on equal ground, something Nurbanu isn't used to and doesn't take very well, as a result. When Nazenin is the one supposed to go to Manisa instead of her, Nurbanu didn't like it, either, and wanted to be the one to take that chance instead of her. And when they reunited, they had to deal with the difference in their changed positions much more openly, with "fighting" about who's superior. It's like their dynamic changed in the blink of an eye and it's moments like these where Nurbanu shows her remaining pride to people in front of her, because seeing a person in a lower position before being elevated as highly as her, no matter how much she would care about her, wounds the pride she once had as a noble woman and that was on her way to keep going on. Even then she certainly didn't want for Nazenin to die and her death was about the last fraction of Nurbanu's past going away and the first step of her human side going away, too. Despite their strained relationship, Nurbanu lost a close person who's been with her from the beggining in this game. [Nurbanu and Nazenin have their share of parallels with Hürrem and Gülnihal: both pairs were together from the start and were forced to stand against each other through an order (though for Nurbanu and Nazenin that wasn't the entirety of it), both Nazenin and Gülnihal wanted to gain their agency and became understandably proud of what they've gained and both Hürrem and Nurbanu were against that and did something to them that put that kind of conflict to an end. Nazenin could also be the "Leo" to Nurbanu in terms of the past to an extent.]
Her dynamic with Dilşah, while mostly being a fight for Selim we knew Nurbanu was going to win, caused another human side of Nurbanu to go away - her bringing a dog in the harem and that dog ending up killed by Dilşah. (similarly to Valide killing Hürrem's horse, which played a role in comforting her during the Isabella arc.) That strongly implied that Nurbanu had a soft spot for animals and that she had a warm, caring side, contrasted with her otherwise cold and pragmatic nature. The killing of the dog, done solely to hurt her, helped to further enforce that coldness and pragmatism and went against any attachment, because perhaps such attachment would only render you vulnerable.
But Mustafa's death was the turning point of Nurbanu's arc, just like with Selim. It sealed even further the path of no return when she saw something she doubted was ever possible ("can a father kill his son?") and while she has "played dirty" before, now the methods she was slowly developing were even more assured. It's like she and Selim had to become unscrupulous at all costs.
In spite of her plans working almost everytime, she has definetly acted irrationally and that is a part of her pride. She acted against Huricihan mostly out of sheer pride and she wouldn't allow for someone to challange her position, even rightfully. That ounce of pride doesn't consume her, however, and doesn't go in the way of her plans, and even if it does, she can turn things around in her favor, like with her part in Huricihan's death.
In the end, Nurbanu has reached a point where she is fixated on her own power and victory at hand, mostly discarding anything else. She looked like a very strict mother the moments we saw her as one - wanting the best for Murad and keeping an eye on who he interacts with. She's developed a huge perceptiveness and sensitivity of future threats that extended to Defne and fixed on Safiye - I feel she realized she would be a danger later down the line during their scene together, even if we leave alone her being raised and gifted by Mihrimah. She may not have expected the amount of Safiye's growing power and influence and that may have caused her to be drastic. We're meant to believe through Safiye's words that Nurbanu became crueler as a Valide Sultan, but that could be coupled by both her development and Safiye's own distinct view on Nurbanu. She probably used means similar to both Ayşe Hafsa and S04 Hürrem.
I see Canfeda as Nurbanu's guide in the Manisa harem itself that also helped her in quite a few ways. But they always came to work more as a unit, considering what is best for Selim and the future in that moment. Both of them are smart, quite opportunistic and dedicated to what they do, that's why they complement each other so well. Canfeda, similarly to Nigar, saw Nurbanu's potential to elevate, but still insisted on following the harem tradition when it was needed. (like with Selim's concubines) Nurbanu seemed really eager to learn from her. They had soft spots for each other, but the quickly changing circumstances they were in didn't allow for many "heart to heart" moments.