It could be Orochimaru. He might see Naruto's 'monster - like' state as an opportunity to use him for his own experiments. Orochimaru has always been interested in power and Naruto's new, strange form could be a source of great power that he wants to harness for his evil plans.
Perhaps in the fanfiction, Naruto is under a genjutsu that makes him see himself as a monster. When he sings 'I Feel Like a Monster', it's a cry for help. His friends start to notice his strange behavior and try to break the genjutsu. Along the way, Naruto's singing might draw the attention of an enemy who wants to use his 'monster - like' state for their own evil purposes.
Well, it could be a very emotional story. Naruto, being the underdog that he always is, finds solace in the song 'Believer'. He might be going through a tough time, like feeling lost after a big battle or a loss in his life. Singing 'Believer' becomes his way of regaining his confidence. The fanfiction could show how his friends react to his newfound passion for singing. Some might support him wholeheartedly, while others might be a bit confused. There could be a big concert - like scene at the end where Naruto sings 'Believer' in front of the whole village and everyone is inspired by his determination and the message of the song.
It could be really interesting. Maybe Naruto would sing about his battles with Pain, expressing his feelings during those intense fights. It might be a way for him to cope with the trauma or to inspire his friends.
It could be really interesting. Maybe Naruto would sing 'Numb' as a way to show his frustration with the expectations of the village. The lyrics of the song might mirror his feelings of being trapped in a system he doesn't fully understand.
Kakashi would be the most perceptive. He'd see how Naruto singing 'Monster' is not just a random act but a way for Naruto to connect with his own fears and insecurities. His friends from the Hidden Leaf Village would overall be proud of Naruto for trying something new and for using the song to share a part of himself that they may not have fully understood before.
It could be really interesting. Maybe Naruto is in a modern - day AU (alternate universe) where he discovers Simple Plan's music and is so inspired that he starts singing their songs. It might be a story about how he uses the emotions in the music to connect with his friends or deal with his own inner demons.
It could be really interesting. Maybe Naruto is in a modern - day AU (alternate universe) where he discovers BTS and their music. He might be at a karaoke bar with his friends and decides to sing Dynamite, surprising everyone with his unique voice. The story could focus on how his ninja skills translate into his performance, like using chakra control to hit high notes.
A 'naruto sings green day fanfiction' might start with Naruto being exposed to Green Day's music in an unexpected way. Maybe he time - travels to a modern era where he hears their music on the radio. As he starts singing, his unique ninja voice and energy could add a new dimension to the songs. The story could also explore how his friends react to this new side of Naruto. Does Sasuke find it annoying or interesting? How does Sakura support his new musical endeavor? And of course, Naruto's singing could also attract the attention of enemies or new allies, creating a whole new set of adventures.
In such a fanfiction, Naruto could be in a different world or dimension where the song 'Time of Dying' has some special significance. He might be forced to sing it as part of a challenge or a curse. As he sings, the power of his voice and the emotions in the song could start to change the environment around him. His friends could be trying to break the spell or help him, while his enemies might be using the situation to their advantage. The fanfiction could explore themes of sacrifice, friendship, and the power of music within the Naruto universe.