Ruby would love the idea of the Fairy Tail guild being like a big family. She would be excited to participate in the guild's activities. Yang would be drawn to the power - up moments in the fanfiction. She would see it as a way to improve herself. Weiss would be critical of any inefficiencies in the Fairy Tail world's governance. Blake would focus on the relationships between the characters, especially the ones that cross different species boundaries. The RWBY characters would bring their own perspectives and experiences when interacting with the concepts in Fairy Tail fanfiction.
For Ruby, the concept of Fairy Tail's magic guilds could be really appealing. She might imagine herself being part of one. Yang would find the idea of the S - Class mages interesting and might want to prove herself against them. Weiss would analyze how the Fairy Tail world manages its economy with all the magic and quests. Blake would be interested in the relationships between the different guilds and how they cooperate or compete. All in all, each RWBY character would interact with the Fairy Tail concepts in different ways based on their own traits and goals.
Ruby would be the most likely to engage with SCP fanfiction concepts in a positive way. She has an open mind and a sense of adventure. So she might see the SCPs as new challenges to face. Weiss would be completely against it. She values elegance and propriety in literature and SCP fanfiction doesn't fit that bill. Blake would look at the SCP concepts from a psychological angle. She'd wonder what makes people create such dark and complex entities. Yang would be all about the action. If there are strong SCPs in the fanfiction, she'd want to show them who's boss.
Bardock would probably be initially cautious around the Fairy Tail characters. Given his Saiyan nature, he is used to a more cut - throat and survival - based environment. But as he gets to know them, he would start to respect their loyalty and sense of family. For example, he might be impressed by how the guild members always have each other's backs, much like how Saiyans rely on their comrades in battle.
Ruby, with her eagerness to grow as a fighter, would study the Kamen Rider's fighting styles and abilities in the fanfiction. She'd be inspired to incorporate some of those moves into her own combat repertoire. Weiss, being the strategic one, would look at how Kamen Rider approaches different situations in the fanfiction and apply those concepts to her own planning. Blake would see the Kamen Rider's fight against darkness as similar to her own fight against the Grimm. She might draw strength from the Kamen Rider's unwavering determination. Yang, always up for a challenge, would be excited by the physical feats that Kamen Rider performs in the fanfiction and strive to match that level of power.
Well, if we think about it, Thor is a very proud and strong warrior. He might initially look down on some of the younger Fairy Tail members, thinking they are weak. But when he sees their determination and the unique magic they possess, he'd start to respect them. For instance, when he sees Lucy summon her celestial spirits, he'd be intrigued as it's a different form of power compared to his.
The interactions could be really interesting. Goku's straightforward and somewhat naive personality in the face of new things would contrast with the more complex relationships and personalities in Fairy Tail. For instance, when he meets Mirajane, she would probably be very kind to him, offering him food and a place to stay at the guild. Goku would then repay her kindness by helping out with any threats that come the guild's way. And with Happy, Goku would find his flying ability really cool and might even try to learn how to fly in the same way, which would be a comical scene.
For Zabuza from 'Naruto' in a 'Fairy Tail' fanfiction, he would interact with the characters in a very direct and often violent way. He would see the Fairy Tail mages as targets or obstacles. If he was hired to kill someone in the guild, he would not hesitate to use his sword skills against them. He might not understand the concept of friendship and loyalty that is so strong in the Fairy Tail guild and this could lead to some interesting clashes.
The characters from Fairy Tail might see the Pokemon as strange but interesting creatures. They could try to befriend them and use their powers together. For example, Natsu might befriend a Charizard and they could team up in battles.
Ruby might try to incorporate some of the unique concepts she finds into her own battles in Remnant. She's always looking for new ideas. Weiss would probably question the logic behind some of the concepts, especially if they don't match up with her understanding of how things should work. Yang would be more likely to use the concepts for entertainment value, like making jokes about them.
The RWBY characters could interact in multiple ways. Ruby would be the one to inspire hope in the Doom - like situations in the fanfiction. Weiss would use her strategic thinking to deal with the challenges. Blake, with her ability to adapt, would find ways to survive. Yang, being the powerhouse, would directly engage with the threats, much like she does in her own world against Grimm. They would all bring their unique Remnant - based skills and personalities to interact with the Doom concepts.
Naruto would probably be really excited to meet the Fairy Tail characters. He's a friendly and outgoing person, so he'd quickly try to make friends. With his Rinnegan, he might be able to sense the different levels of power among the wizards and be in awe of some of their magic. The Fairy Tail characters, on the other hand, would be curious about Naruto. Natsu might challenge him to a friendly fight at first, thinking he's just another tough guy. Lucy would probably be more cautious and ask a lot of questions about where he came from and what the Rinnegan is.