Obviously, Naruto is one of the main characters as the title implies. He's the one who's constantly pushing his limits. Sakura might also be an important character, perhaps as a support to Naruto in his growth, providing medical assistance or strategic advice during his adventures.
In this kind of fanfiction, one exciting plot could be Naruto mastering a new and extremely powerful jutsu. For example, he might combine different elemental chakra in a way no one has thought of before, like mixing lightning and water chakra to create a unique attack. This new jutsu could give him an edge in battles against strong foes.
Naruto might also face emotional burnout. If he's constantly pushing himself in his relationships, he could end up feeling drained. For example, if he's always trying to be there for everyone but not getting the same support back, he could become depressed or angry. This can then affect his performance as a ninja and his relationships further.
In some fanfictions, one of the bloodline limits could be something like a super-enhanced Sharingan-like ability. Another might be a power related to controlling natural elements in a unique way, for example, a more powerful form of water control. And perhaps a bloodline limit that gives Naruto the ability to instantly teleport short distances. However, different fanfictions can have very different interpretations of these six bloodline limits.
There could also be emotional consequences. If he pushes himself too far in the heat of battle or in pursuit of a goal, he might alienate his friends and allies. They may be worried about his well - being and feel that he's being reckless. This could lead to strained relationships until he learns to find a balance between pushing his limits and taking care of himself.
Yes, in fanfiction, Naruto can often be depicted as having the ability to copy bloodline limits. Fanfiction writers like to explore different scenarios and expand on the characters' capabilities, and Naruto's ability to copy jutsu makes it somewhat plausible in this fictional realm.
The bloodline limits can make Naruto even more powerful. He may become more confident as he realizes the extent of his new abilities. For example, if one of the limits gives him enhanced speed, he might be more daring in battles.
One implication is that it makes Naruto extremely powerful. He can gain access to unique abilities that were previously exclusive to certain clans. For example, if he copies the Uchiha's Sharingan powers, he could gain enhanced perception and the ability to use powerful genjutsu.
They can expand the limits by combining different bloodline traits. Let's say a fanfic combines the Nara's shadow manipulation with the Inuzuka's connection to animals. A character could use their shadow to control the movements of animals, which is a completely new and exciting ability. This not only breaks the existing limits but also creates unique storylines and character developments.
In all likelihood, 'No Limits' isn't a true story. Stories often blend imagination and elements to engage the audience, and this one could be no exception.