There could be a scene where a powerful and mysterious ninja appears and tries to put a seal on the Nine - Tails within Naruto to limit its power. Naruto, sensing the danger, immediately activates his Kyuubi Chakra Mode. He would then engage in a fierce battle with this ninja. He would be so focused on protecting the Nine - Tails that he would not back down even when facing seemingly impossible odds. And in a more emotional scene, Naruto might have a conversation with the Nine - Tails inside his mind, promising to always protect it from any harm.
In fanfiction, Naruto's protectiveness towards the Nine - Tails can stem from multiple reasons. Firstly, he has had a long journey of co - existing with it. They have a symbiotic relationship now. Secondly, Naruto has seen the power of the Nine - Tails and how it can be misused by others. He doesn't want that to happen. He also respects the Nine - Tails as a powerful entity. When it comes to threats against the Nine - Tails, Naruto uses his skills and his bond with it to safeguard it. He might even negotiate with others on behalf of the Nine - Tails to ensure its safety and well - being.
In some fanfiction, there could be a situation where a new organization wants to use the Nine - Tails for their evil experiments. Naruto, being aware of this, would go on a solo mission to stop them. He would put himself in danger to ensure the Nine - Tails' safety. Also, if there were rumors or threats of someone trying to steal the Nine - Tails' power, Naruto would increase his guard and be extra vigilant, ready to defend at any moment.
One memorable scene could be when Naruto is about to be attacked by a powerful enemy. Kushina suddenly appears, her red hair flowing in the wind, and she uses her chakra to create a shield around Naruto. She stands firm, glaring at the enemy, and says something like 'You will not touch my son.' It's a very powerful moment that shows her determination to protect Naruto.
Often, in such fanfiction, Itachi protects Naruto from the Akatsuki. Since Naruto is the jinchuriki of the Nine - Tails, the Akatsuki might target him. Itachi, being part of the Akatsuki but having his own motives, would ensure Naruto's safety from his comrades. He could mislead them about Naruto's whereabouts or lie about Naruto's power level to keep them from making a hasty move against him. Itachi might also protect Naruto from the villagers' negative attitudes. Naruto was often ostracized in the village, and Itachi could use his influence or just his presence to make the villagers think twice before treating Naruto badly.
She might physically stand in harm's way. For example, if there's a threat approaching Naruto, Kushina would put herself between Naruto and the danger. Just like how a mother bear protects her cub.
Minato might show his protectiveness by always being near Naruto in spirit. For example, he could leave behind some kind of jutsu or power that activates when Naruto is in great danger, like a hidden seal that releases a powerful defense.
Sasuke might show his protectiveness by always being near Naruto in dangerous situations. For example, if they are in a battle, she would quickly jump in front of Naruto to shield him from attacks.
It could lead to Naruto making risky decisions to keep the Nine - Tails safe. For example, he might face off against powerful enemies alone rather than risk the Nine - Tails being captured. This would add a lot of tension to the plot as his friends worry about him and the overall situation in the ninja world becomes more uncertain.
Maybe through new jutsu or abilities. The fanfiction could give Naruto some unique power that allows him to communicate or negotiate with the Nine - Tails on a different level. He could use this power to show the Nine - Tails a different perspective, like the potential for harmony between them instead of constant struggle.
Another possibility is that Naruto's sickness is a sign of a greater imbalance in the chakra world. The Nine - Tails, being a powerful source of chakra, could be at the center of this imbalance. So, the story could revolve around Naruto and his friends trying to restore the balance while also taking care of Naruto's health. This would involve a lot of exploration of the Naruto universe's lore and the relationship between different chakra entities.