Multiverse reaction fanfiction is basically fanfiction that plays with the concept of multiple universes. In this kind of fanfic, characters are put in situations where they get to observe or interact with elements from other universes. It can be really exciting as it combines different fictional worlds. Say, characters from a fantasy world reacting to the technology of a science - fiction universe.
One interesting concept could be seeing how different versions of characters from various Naruto universes react to each other. For example, a more ruthless Naruto from a dark timeline meeting the original Naruto. It can create unique character dynamics and exploration of 'what - if' scenarios.
Naruto himself is often a popular choice. Since he's the main character in the original series, seeing how he reacts in different multiverse situations is always interesting. His positive attitude and determination can contrast or complement other versions of himself.
He might be really intrigued. Naruto is always open to new ideas and adventures. Seeing different versions of his world and himself in the multiverse fanfiction could make him excited to explore those possibilities, even if they are just fictional concepts.
Basically, 'rwby multiverse reaction fanfiction' is a type of fan - created story. In this, the RWBY characters are put in situations where they react to things from different parts of the multiverse. For example, Ruby might react to seeing a version of herself that has made different choices in life. It often combines elements of the original RWBY series with new and imaginative concepts from the multiverse idea.
To write a good multiverse reaction fanfiction, first, you need to have a solid understanding of the different universes you're bringing together. Research the characters, their backgrounds, and the rules of their respective worlds. Then, create an interesting scenario that would cause these characters to interact. Make their reactions believable. For example, if a character from a medieval world sees a spaceship, their shock and confusion should be well - described.
Well, Harry Potter has been through a great deal in his own universe. When exposed to multiverse fanfiction, he could initially feel a sense of disbelief. But as he delved deeper, he'd start to see the creativity in it. He might be amused by some of the out - there ideas, like a universe where Hogwarts is a floating castle in the sky or where he's a Slytherin. He'd also perhaps feel a bit of pride in seeing how popular his story has become that people are creating these elaborate multiverse concepts around it.
One interesting aspect is seeing different interpretations of the original characters. For example, how would a character from the main Potterverse react to a completely different version of Hogwarts in a multiverse scenario. Another aspect is the exploration of new magical concepts that might exist in these alternate universes.
You can start by looking on popular fanfiction websites such as Archive of Our Own (AO3). It has a large collection of RWBY fanfictions, and you can specifically search for 'rwby multiverse reaction' within the RWBY category. Another option is FanFiction.net, which also has a decent amount of RWBY - related fanfictions.
They might be really intrigued. Ruby, for example, would probably be excited to see all the different versions of themselves and their friends in the multiverse. It could give her new ideas for combat strategies or just fuel her sense of adventure.