Perhaps he could have some sort of dark - based chakra manipulation. Demons usually have unique chakra, and Naruto's demon part might allow him to use a different form of chakra that gives him new jutsu, like the ability to create shadowy clones or dark - energy attacks.
Well, Naruto could have a range of reactions. On one hand, he might feel a sense of isolation, thinking that he's different from all the other ninjas he knows. But on the other hand, his adventurous spirit could also make him curious about what this new part of him means. He might start to wonder about his powers and how they relate to his demon heritage. He could also be a bit scared, especially if he has been taught to fear demons in the ninja world.
She might be overjoyed. After all, Naruto is her son. She could immediately rush to find him and embrace him tightly, tears of happiness streaming down her face.
One possible plot twist could be Naruto's struggle to adapt to a different gender identity within the ninja world. He might face discrimination or confusion from his peers at first. For example, his male friends like Sasuke or Shikamaru might be initially shocked and not know how to act around him. However, Naruto's strong will would likely drive him to prove that gender doesn't define his abilities as a ninja. He could still pursue his dreams of becoming Hokage, but now also deal with the added challenges of being a female in a male - dominated society in the ninja world.
Well, Naruto has always been very headstrong and determined as a boy. As a girl in this fanfiction, his character could develop in a way that combines his old tenacity with a new - found grace. He might learn to use his femininity as a strength, for example, in the art of deception during missions. His relationships with other characters would also shape his development differently. With his friends, he could learn to rely on them in new ways, and with his enemies, he might be underestimated even more, which could give him an advantage. All in all, his character development would be a fascinating journey of self - discovery and growth in the face of a major identity shift.
Naruto's reaction could be complex. On one hand, he would be happy to find someone else from his clan. He has always been proud of his Uzumaki heritage despite not knowing much about it at first. But on the other hand, he might be a bit cautious. Karin has been associated with some not - so - good groups in the past. However, overall, his positive nature would probably lead him to approach Karin with an open mind and try to build a connection with her based on their shared Uzumaki roots.
In this kind of fanfiction situation, it could lead to a lot of complex emotions for Mal. He might feel shocked and confused at first. If they are related, it could completely change the dynamics of their relationship, whether it was previously one of rivalry or something else.
There could be a big divide within the village. Some villagers might feel guilty and try to make amends, while others might be defensive. This could lead to internal conflict. The village elders might also have to take steps to reform the village's social structure to prevent such abuse from happening again.
Naruto could also be a bit angry at first. Angry that she had been away from him all this time. But then that anger would quickly turn into overwhelming love and relief. He would have so many questions to ask her about why she wasn't there as he was growing up, but at the same time, he would be so glad to have her there now.
One common plot is Kushina finding Naruto in a different time or dimension. For example, she might end up in the future where Naruto has grown up and she gets to see the kind of person he has become. It's an emotional and interesting concept as she gets to witness all his achievements and the challenges he has overcome.