In Naruto fanfiction, the 'Power of Rage' often gives characters superhuman strength. For example, Naruto might enter a rage state and his chakra levels skyrocket, allowing him to perform jutsus more powerfully. It can also make him more resistant to pain and fatigue. This power is usually triggered by something important to the character, like seeing a friend in danger.
One common scenario is when a character's loved one is in mortal danger. Naruto, for example, if Hinata were in a life - threatening situation, his 'Power of Rage' would likely kick in, and he'd fight with extraordinary ferocity. Another scenario could be when a character's sense of justice is violated. Kakashi might experience the 'Power of Rage' if he saw innocent villagers being unjustly attacked.
Well, in 'naruto rage fanfiction', a frequent theme is the transformation of Naruto's character. His rage can make him more aggressive and less forgiving. Also, the theme of isolation can be present. As he becomes consumed by rage, he may push away his friends. For example, some stories show how his rage over a betrayal causes him to cut off ties with certain characters. Another theme could be redemption. He has to find a way to control his rage and redeem himself in the eyes of others or in his own eyes.
Power enhancement is a common theme. Naruto's blood rage often gives him a boost in power, allowing him to overcome tough opponents. For example, in many fanfictions, he can defeat enemies he couldn't before when the blood rage kicks in.
Another theme is the clash of cultures. In a 'naruto rage crossover fanfiction', Naruto's ninja - based culture collides with the culture of the other world he crosses into. His rage could be a result of misunderstandings or attempts to protect his own values. For instance, if he crosses into a world where honor is defined very differently, he might get angry when his ninja honor is questioned.
Naruto himself often features prominently in such fanfiction. His already strong will and determination can be combined with the rage bloodline to create a really powerful version of him. Sasuke is also a popular choice. His brooding nature and quest for power can be intertwined with the rage bloodline in interesting ways.
One common theme is revenge. Since Naruto has a lot of enemies and a tragic past in the original series, in rage - filled fanfiction, he might be driven by a desire for revenge against those who wronged him or his village. Another theme could be power. His rage might fuel his pursuit of greater power to protect himself and others. And also, there could be themes related to isolation, as his rage might make him push people away or make others fear him.
In Naruto fanfiction, one common power - up is related to new jutsu creation. For example, some fanfictions might have Naruto develop a jutsu that combines the power of all five chakra natures in a completely unique way. This could give him an edge over his enemies like never before. Another aspect could be the enhancement of his Sage Mode. Maybe he finds a way to make it more stable and powerful, allowing him to stay in the mode for a much longer time without any negative side effects. There are also fanfictions where Naruto gains the ability to control time, which is a completely new and overpowered concept that makes for really interesting stories.
Sasuke is likely to be involved. Given their complex relationship, Sasuke might be on the receiving end of Naruto's rage at times or be someone who tries to understand and calm him. Kakashi could also be there, as Naruto's sensei, he would surely be involved in dealing with Naruto's rage.
Well, in some naruto rage bloodline fanfiction, there might be a story where the main character discovers that their rage bloodline has the power to manipulate the elements in a completely different way compared to normal ninjas. For instance, instead of using hand signs, they can just channel their rage to create fire or water. Also, there could be a plot where the rage bloodline is seen as a curse at first, but then the character learns to control it and turn it into an advantage, like being able to sense danger more acutely when angry.