Rock Lee would see it as a new form of inspiration. He'd be amazed at the creativity of the fans and would try to incorporate some of the ideas from the fanfictions into his own training regime. He'd be shouting things like 'These fan - made stories are full of youthful energy!' and would be really enthusiastic about the whole concept.
Naruto would be thrilled. He loves being the center of attention and seeing all these stories about him would make him feel even more important. He'd probably want to meet the writers and tell them how cool he thinks their ideas are.
They could have a range of reactions. Naruto would likely be excited and eager to see new stories about his world. He loves adventures and would be interested in seeing different takes on his life.
Kakashi would be very observant. He would look for how the fanfiction writers understand the world of Naruto, the values and the moral lessons. He might even use some of the creative ideas from the fanfiction in his own teachings if he thought they were valuable and in line with the spirit of the original story.
Naruto would likely be excited. He loves his son so much that seeing different stories about Boruto would be like seeing different potential futures for him. He might even get some inspiration from the fanfiction to give Boruto some advice in real life.
They may find it funny. There are often humorous fanfictions that could make them laugh.
He might be entertained. The abridged versions often have humor and can make light of serious situations in the original Naruto story.
He might be really excited. Naruto loves new and exciting things, and the multiverse fanfiction would be full of that.
He would likely be very curious. Naruto has always been eager to learn and explore new things, so seeing future fanfiction would be like opening a door to a new world of possibilities for him.
He'd probably be shocked. His world is already full of surprises like different jutsus and powerful enemies, but the multiverse would be on a whole new level. He might not believe it at first and think it's some kind of elaborate prank or illusion.
Some might laugh. They could find the humorous takes in the fanfiction really entertaining. Maybe there are some comical interpretations of their actions or dialogues that they themselves didn't expect.
Some characters might be shocked. They may not expect such wild interpretations of their lives and relationships.