In this type of fanfiction, the fem Kyuubi's possessiveness might be manifested in her protecting Naruto at all costs. She could be overly vigilant and not allow any harm to come near him. This could lead to her interfering in battles or situations where Naruto might be in danger, even if he doesn't necessarily need her help all the time. She may also try to monopolize his time, not wanting him to go on missions with other people or make new friends. Her possessiveness could also be expressed in a more emotional way, like getting sulky or angry when Naruto doesn't pay enough attention to her.
She might be overly protective of Naruto in fanfiction. For example, she could prevent other characters from getting too close to him or interfere when she thinks Naruto is in a potentially harmful situation.
The fem Kyuubi could also be protective in a more subtle way. Maybe she gives Naruto advice based on her long - time existence and knowledge. Like warning him about certain dangerous jutsus or shinobi he should avoid. She uses her wisdom to keep Naruto out of harm's way.
The possessiveness of the fem bijuu towards Naruto can be a major plot device. It can add an element of drama and tension. Maybe the fem bijuu are possessive because they see Naruto as their only hope or as a special being. This possessiveness could lead to them overprotecting Naruto. As a result, Naruto may become more isolated from his usual comrades, which would be a significant change in the story. And this isolation could cause Naruto to develop in a different way, perhaps becoming more reliant on the fem bijuu or learning new skills to deal with their possessiveness.
In this fanfiction, Gaara's possessiveness could be demonstrated in different ways. Firstly, he might be possessive in terms of her time. He wants to spend as much time as possible with her. Secondly, he could be possessive about her emotions. He doesn't want her to be too friendly with other guys as he fears she might develop feelings for them. Also, he may be possessive about her safety, always being on guard and ready to fight off any threats to her.
In many fanfictions, Fem Naruto might show kindness towards the Kyuubi. This kindness could be something the Kyuubi has never experienced before. For example, instead of just seeing it as a source of power, Fem Naruto might try to understand the Kyuubi's past and pain. This could lead to the Kyuubi gradually opening up to her and them developing a deeper bond.
One possible reason could be that in the Naruto universe, Naruto has a special connection with the Kyuubi. As a female Kyuubi in fanfiction, she might feel a stronger emotional bond towards Naruto. She may see Naruto as her sole companion or the one who truly understands her, which leads to her possessiveness.
Another way could be through communication. In some private moments, she might open up to Naruto about how she feels. She could say things like 'You are important to me, and I want you by my side always' in a soft and sincere tone.
At first, Naruto might be a bit scared or hesitant. But as the fem Kyuubi shows her caring side, like protecting him from danger, Naruto starts to trust her. As time goes on, they become more like family. The fem Kyuubi shares her wisdom with Naruto, and Naruto in turn shows her the value of human emotions.
It's possible that Naruto frees Fem Kyuubi by making a sacrifice. Maybe he offers a part of his own life force or chakra in order to break the chains that bind her. This selfless act shows his deep connection with the Kyuubi and his willingness to do whatever it takes to set her free.
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.