It could be that his new 'godlike' power has isolated him. People might be either in awe or afraid of him, and he may feel that he can't be close to others as before. So he acts coldly as a defense mechanism.
One great cold FEM Naruto fanfiction is 'The Ice Princess of Konoha'. It features a female character with ice - related powers in the Naruto universe. The story is really engaging as it shows how she overcomes various challenges and her interactions with the well - known Naruto characters are quite interesting.
One reason could be the novelty. It offers a fresh perspective on the well - known Naruto universe. By making Naruto female, it can change the dynamics of relationships in the story, for example, in how she interacts with Sasuke or Sakura. Also, it might attract female readers who can more easily identify with a female lead in a story they already love.
I think it's the mystery element. A cold FEM character usually has a lot of secrets. Maybe she's from a lost clan or has a special mission. In the Naruto setting, this mystery adds to the allure. Fans are always eager to find out more about her past, her powers, and how she'll fit into the overall Naruto story. It's like uncovering a hidden part of the Naruto world that we didn't know existed before.
Perhaps he is trying to hide his true self. He may have a side of him that he doesn't want others to discover, like some special abilities or a different origin. So, being cold to everyone helps him keep his secrets and avoid getting too close to people who might figure him out.
It could be due to a personal loss that has hit him really hard. Maybe he lost someone very close to him, like Jiraiya all over again, but this time it has broken him in a way that he shuts everyone out. He might also be under the influence of a new power that he doesn't fully understand yet, and this power is affecting his emotions, making him cold as a side - effect until he learns to control it.
Naruto and the Fem Kyuubi could team up due to a twist of fate. Maybe an outside force tries to take advantage of the Kyuubi again, and Naruto realizes that the only way to protect both himself and the Kyuubi is to work together. They would form a pact where Naruto would have access to more of the Fem Kyuubi's power in exchange for helping her get revenge. They would start small, by causing trouble for the lower - level ninja who have always taunted Naruto. As they gain confidence, they would move on to bigger targets, like the village council who have made decisions that have affected both of them negatively.
Well, at first, people around him would be very confused and try to reach out. But Naruto would just push them away. Then, his former friends might start to get frustrated with his coldness. Some might even turn against him thinking he has changed for the worse.
There could be a fanfiction where Fem Naruto discovers a hidden side of Fem Kyuubi. Maybe Fem Kyuubi has some memories or powers that were locked away and Fem Naruto helps her unlock them. This could set off a chain of events that not only changes the relationship between them but also has a major impact on the entire ninja world as they face new threats and opportunities together.
One plot idea could be that the cold Naruto is initially distrustful of the Fem Kyuubi. But as they interact more, he starts to see her as more than just a powerful being. For example, she could help him in a battle against a common enemy, and during that time, he realizes her loyalty and they begin to form a bond.