One possible plot development could be that Naruto uses Kirin to surprise his enemies. Since it's not a jutsu associated with him usually, it would catch his foes off - guard.
I haven't read this particular fanfic specifically. But generally, if Naruto learns Kirin in a fanfic, it would be really interesting. Kirin is a powerful lightning - style jutsu. Naruto is mainly known for his Wind - style and Sage - mode abilities. Learning Kirin could potentially give him a whole new offensive option, making him even more formidable in battles against strong opponents.
The Naruto learns Rasengan fanfic can take the story in various directions. One direction could be a more in - depth exploration of the Rasengan's origin within the context of the fanfic. Another could be a time - travel plot where Naruto goes back in time and teaches his younger self how to learn Rasengan faster. It might also focus on the emotional turmoil Naruto goes through when he struggles to learn the jutsu, especially if he feels like he's letting down his village or his teacher Jiraiya.
Jiraiya could also be involved. Jiraiya, being Naruto's mentor, has a vast knowledge of different jutsus. He might have come across some ancient scrolls or techniques that are related to the creation of Kirin. He could guide Naruto in understanding the more spiritual and chakra - flow aspects of creating such a powerful jutsu.
Sure. You can try looking on fanfiction.net. There are likely many fanfics there about Naruto learning the Rasenshuriken. Just use the search bar and type in 'naruto learns rasenshuriken' and you'll get a list of relevant stories.
One factor that makes a 'Naruto Learns Rasengan Fanfic' great is the ability to add new elements to the story. Instead of just repeating what happened in the anime or manga, it could introduce new challenges for Naruto. Maybe there's a new enemy who is also after the Rasengan's secrets, and Naruto has to learn it quickly to defend against them. Additionally, the fanfic should have a good pacing. It shouldn't rush through Naruto's learning process but also shouldn't drag it out too long.
Well, in such a fanfic, Naruto could start learning haki perhaps from a mysterious traveler who has knowledge of different worlds. He might first struggle with understanding the concept of haki, like differentiating between Observation Haki and Armament Haki. Then, as he trains, he could gradually incorporate haki into his existing jutsu. For example, using Armament Haki to strengthen his Rasengan, making it even more powerful and capable of breaking through tough defenses that normal Rasengan couldn't. This would make him an even more formidable opponent in battles against tough enemies like Madara or Kaguya.
In a more creative fanfic, an ancient ninja who was the originator of the Chidori technique could appear. This ninja could be brought back to life through some sort of magic or jutsu. He sees Naruto's pure heart and decides to pass on the Chidori knowledge to him, believing Naruto will use it for good.
Maybe an ancient sage in Naruto's own world who has long - been in seclusion. This sage has knowledge of different power systems beyond just chakra. He notices Naruto's pure heart and strong will and decides to pass on his knowledge of haki to Naruto, believing that Naruto can use it for the greater good of the ninja world.
Maybe a mysterious traveler from a far - off land. This traveler has mastered many unique jutsus including Dust Release. He crosses paths with Naruto during one of Naruto's solo adventures and takes him under his wing after seeing Naruto's eagerness to learn new techniques.