Well, one way it could be shown is that Naruto discovers Ki as a new form of energy during one of his training sessions. He then tries to incorporate it into his fighting style. Tenten might learn about Ki from Naruto or some other source in the fanfiction world. She could use Ki to create a sort of energy field around her weapons, making them harder to dodge. Naruto could use Ki to boost his speed and agility, similar to how he uses his chakra in the original series but with a different flavor due to the Ki element.
If Naruto and Tenten use Ki in fanfiction, Naruto might use it in a more instinctive way at first. Since he has always been in tune with his inner energy, Ki could seem like a natural extension. He could use it to sense his opponents better, like an extra sense added to his already sharp skills. Tenten could use Ki to give her weapons unique properties. For instance, she could make her kunai cut through stronger defenses by imbuing them with Ki. The combination of their different uses of Ki could also lead to interesting team - up attacks, where Naruto's more all - around Ki usage and Tenten's weapon - focused Ki application work together to defeat powerful foes.
In fanfiction, Naruto and Tenten using Ki could be depicted in various ways. Naruto, with his already powerful chakra, could blend Ki with it to create even more powerful attacks. For example, his Rasengan might be enhanced with the focused energy of Ki. Tenten, on the other hand, could use Ki to better control her weapons. She might infuse Ki into her thrown weapons, giving them a greater range and impact. This could make her a more formidable opponent in battles, especially when combined with her already impressive weaponry skills.
In some fanfictions, Naruto might be able to use Ki by undergoing special training. Maybe he meets a mentor who teaches him the ways of Ki manipulation. This mentor could be from a different realm or have a unique connection to Naruto's own chakra system, and through intense practice and spiritual growth, Naruto gradually masters the use of Ki.
Naruto's advantage with Ki would be the ability to access a different type of energy source. This could potentially allow him to break through new barriers in his power development. Tenten could use Ki to make her weapons more versatile. For example, she could change the shape or trajectory of her weapons mid - flight using Ki. Also, both of them could use Ki to better defend against attacks. Ki could form a protective shield around them, which is something new compared to their normal defenses in the original series.
Naruto could use his shadow clone jutsu to create distractions. While Gai is busy dealing with the clones, Naruto can quickly get Tenten to a safe place.
They could do endurance training, like running long distances while also practicing weapon - handling for Tenten and chakra control for Naruto.
Naruto could use Ki to enhance his sensory abilities. In the Naruto universe, he already has good sensory skills with his chakra. But by adding Ki into the mix, he could expand his range of detection even further. He could sense enemies from much greater distances or even detect hidden traps or secrets in the environment around him.
Naruto might be really confused at first. He's used to people being friendly or having normal crushes, but a yandere is a whole different level. He'd probably try to talk to her and understand why she's acting so strangely.
Well, Naruto has his Nine - Tails chakra. He could potentially tap into that power to either overpower Might Guy or create some kind of shield around Tenten. He might also use his Rasengan, but in a non - lethal way to stop Might Guy's attacks long enough to protect Tenten. Also, Naruto is known for his quick thinking and adaptability in battle, so he could come up with a unique strategy on the spot depending on the situation.
Their relationship could start with mutual respect. Naruto respects Tenten's dedication to her weapon - based ninjutsu, and Tenten respects Naruto's strength and determination. They might start training together more often, which would lead to them spending a lot of time together. This time together would allow them to open up to each other about their pasts, their fears, and their hopes for the future. As they grow closer, they would start to develop feelings for each other, and these feelings would eventually lead to their marriage.
It could be that Might Guy is under some sort of mind - control. So, without his normal self - control, he attacks Tenten, making it necessary for Naruto to save her.
In some fanfictions, Naruto might reshape Tenten by influencing her training methods. For example, he could introduce his own unique ways of chakra control and combat strategies, which might inspire Tenten to become more creative in her use of weapons and ninjutsu. This could lead to her developing new techniques and becoming a more well - rounded ninja.