Blake could also be a great character to focus on. Given her own complex backstory and her tendency to be more introspective, she might have deeper insights into the characters and situations in the Undertale AUs. She could form unique relationships with some of the more morally ambiguous characters in the Undertale multiverse.
Well, they might see different versions of characters from Undertale. For example, the RWBY characters could be really surprised by the unique battle mechanics in Undertale's AU multiverse. Maybe Ruby would be especially interested in the different types of weapons or magic used in that world.
Ruby and Frisk would be a really interesting pairing. Ruby is full of energy and determination, and Frisk has that unwavering kindness. They could learn a lot from each other, especially in terms of how they approach difficult situations and make decisions.
One interesting pairing could be Thor and Yang Xiao Long. Thor is a powerful Asgardian with his hammer Mjolnir, and Yang is a brawler with her powerful punches. They could have some great fight scenes together, and also share stories about their respective families and how they became strong. Another pairing could be Black Widow and Blake Belladonna. Black Widow's stealth and combat skills combined with Blake's agility and ability to use her shadow clones would make for an interesting dynamic.
One cool plot twist could be that in one of the multiverse scenarios, their enemies are actually their allies. This would completely turn their understanding of good and evil on its head and force them to reevaluate their relationships. It could lead to some really intense character development as they try to figure out what this means for their own world.
There are several engaging plots in RWBY Watch Multiverse fanfiction. One is the idea of a multiverse - wide tournament where different versions of RWBY teams compete against each other. This allows for interesting character interactions and showcases different fighting styles. Another plot could be about a multiverse - breaking event that causes chaos and the main RWBY characters have to restore order. They might encounter versions of themselves that have turned evil due to the chaos. Additionally, a story where a character from a non - RWBY universe gets trapped in the RWBY multiverse and has to adapt and find a way home while also getting involved in RWBY - related adventures can be quite interesting.
Ruby could be the most important. Her leadership skills and determination are crucial. She has the ability to inspire others, and in this au, she might be the one who first senses the impending danger to Beacon and rallies everyone to take action.
Ruby herself could have major revelations. Since she's the main character, seeing different versions of herself and different ways her story could have gone might make her question her own path and purpose.
Well, if Undertale could watch Undertale fanfiction, it could lead to some chaos. For example, Sans might make jokes about the wild scenarios in the fanfics. Papyrus, on the other hand, might be eager to correct any misinformation about himself. And Flowey could use it as a way to manipulate things further, seeing how the fans view the characters and using that knowledge to his advantage in this strange, meta - situation.
I think Weiss would be the most interesting. Given her complex personality, her pride in her family name and her skills, seeing her react to the honest trailers in the fanfiction would be full of drama. She might get really worked up over any perceived slights or be pleasantly surprised by accurate praise.
Definitely Mario and Sans. Sans' laid - back attitude and his powerful abilities would contrast greatly with Mario's more heroic and straightforward nature. Their conversations would be filled with humor and misunderstandings. For example, Sans might make some jokes about Mario's mustache or his choice of overalls, while Mario would be confused by Sans' skeletal appearance and his knowledge of timelines.