Ruby would probably be both scared and fascinated. She's always been curious about new things, and Godzilla is definitely something new. But she would also be worried about the destruction it could cause. Weiss might be more cautious and initially see Godzilla as a threat to the order in Remnant. Blake would likely be on guard, observing Godzilla's behavior to see if it's truly hostile or not.
One idea could be that Godzilla arrives in the RWBY world due to a strange rift in dimensions. The Huntsmen and Huntresses initially see Godzilla as a huge threat and try to fight it. But then they discover that Godzilla is actually there to fight a common enemy, like a new type of Grimm that is immune to normal attacks but vulnerable to Godzilla's atomic breath.
A plot could involve a mad scientist in the RWBY world who tries to recreate the power of Godzilla using Dust. However, the experiment goes wrong and starts to attract the real Godzilla. The RWBY teams then have to deal with the chaos caused by the approaching Godzilla. They might think that Godzilla is there to destroy their world, but as they fight, they discover that Godzilla is actually attracted to the unstable energy that the mad scientist created, which is also a threat to the balance of their world. So, they have to find a way to work with Godzilla to neutralize the dangerous energy source.
Yang would be a likely character. She's bold and not one to back down from a challenge. She might see Godzilla as a huge opponent to test her strength against. Maybe she'd start off trying to punch it, only to realize that brute force alone won't work and then have to figure out a more strategic way to interact with it.
One idea could be that Godzilla arrives in the RWBY world due to a strange dimensional rift. The Huntsmen and Huntresses initially see it as a huge threat and try to fight it. But then they discover that Godzilla is actually there to fight a common enemy, like a new type of Grimm that is immune to normal attacks but vulnerable to Godzilla's atomic breath.
Ruby would be a likely candidate. She is the leader of Team RWBY and has an open - minded nature. She would be able to see beyond Godzilla's initial appearance as a threat and might try to communicate with it. Yang, with her fearless attitude, could also be part of the alliance. She is not afraid to face powerful opponents and would be willing to fight alongside Godzilla if it means protecting the world. Blake, given her experience with different species and her ability to empathize, could also be part of the group that tries to form an alliance with Godzilla.
One idea could be that Godzilla is drawn to the energy source of one of the Avengers' tech, like Stark's Arc Reactor. This causes chaos as Godzilla approaches the city where the Avengers are based. The Avengers initially see Godzilla as a threat and try to fight it. But then they realize that an even bigger alien force is using Godzilla's presence as a distraction. So, they have to find a way to communicate with Godzilla and work together to defeat the common enemy.
Once upon a time, in a strange new world where the boundaries between reality and fantasy were blurred, Godzilla emerged into the Pokemon universe. Pikachu was the first to sense the great beast's arrival. The electric mouse Pokemon was both terrified and curious. Godzilla, on the other hand, was confused by this new land filled with small, strange creatures. As he stomped through the forest, he accidentally knocked down a nest of Pidgey. The Pidgey were angry and began to attack Godzilla, but their small beaks and feathers did little to harm the giant. Meanwhile, trainers from all over the region came to see what was causing the commotion. One brave trainer decided to try and capture Godzilla with a Pokeball, but it was immediately destroyed by Godzilla's atomic breath.
A possible fanfiction could involve Kiryu's memories of Godzilla influencing the RWBY characters. For example, Godzilla's tenacity and will to protect could inspire Ruby and her team. They could learn from Kiryu's combat techniques and use them against the Grimm. And perhaps Kiryu could be repaired and upgraded using RWBY's technology.
Ruby would find it amazing. She'd be so into the huge scale of the Godzilla stories and would probably try to incorporate some of the epicness into her own fighting style. Weiss would be a bit of a snob about it at first, but then she'd get into the complex relationships between the characters in the fanfiction. Blake would like the deeper meanings and the exploration of power and fear. Yang would be all about the action and would be like 'Go Godzilla!' the whole time.