After Kurama's death, Naruto faced new challenges. His chakra reserves were reduced, but he continued to guide and inspire the younger generation of ninjas. He also had to adapt his fighting strategies without Kurama's immense power.
Yes, unfortunately, Kurama passed away in the manga. This occurrence brought about a lot of changes and emotions for both the characters and the readers.
For Naruto, it would be a whole new experience. He'd be constantly trying to communicate with the mecha Kurama, learning its quirks. Shikamaru might be the one thinking about the strategic uses of mecha Kurama in battle. He'd be coming up with plans on how to best utilize it. As for Kurama, he could be in an internal struggle. Part of him would want to stay relevant in Naruto's battles, while another part would be curious about this new mechanical version of himself and how it could help Naruto in the long run.
Well, their friendship developed over time. Naruto was initially seen as a vessel for Kurama, but as Naruto grew stronger and showed his determination, Kurama started to respect him. Naruto didn't view Kurama as just a monster but as a being with feelings. He tried to understand Kurama and in return, Kurama began to see Naruto as a worthy partner. Their bond grew through battles and shared experiences, like when they fought together against Pain. Eventually, they became true friends, relying on each other's strength and willpower.
Kurama might become angry at first. He's a powerful being and being neglected would likely wound his pride. He could start causing some minor disruptions inside Naruto, like making it harder for Naruto to access his chakra.
Well, in some fanfic concepts, Kurama might release Naruto's potential by sharing its own chakra in a more direct and unrestricted way. Maybe it could be like a full-on infusion of Kurama's power, which then unlocks hidden abilities within Naruto that were previously dormant due to Naruto's own self - imposed mental blocks or lack of proper training to handle such power.
Well, Kurama might train Naruto by teaching him how to better control and access chakra. Since Kurama has a vast amount of chakra, it could show Naruto unique ways to harness and use it. For example, it could guide Naruto in creating more powerful and complex jutsu by using their combined chakra in a more efficient way.