Happy, Natsu's sidekick, is almost always present in these fanfictions. His ability to fly can add an extra element of fun to the pool party, like dropping water balloons from above. And of course, the guild master Makarov might be involved, either as the organizer or as an observer, adding his wisdom and humor to the whole pool party scenario.
Typically, Natsu and Lucy are often the main characters in Fairy Tail related fanfictions, and they could very well be the ones involved in a 'gale kiss' scenario. Their dynamic relationship, with Natsu's brashness and Lucy's more level - headed nature, makes for interesting stories when a special moment like a kiss occurs.
Gray is another character. His ice - magic can complement Natsu's fire - magic. They might team up to fight enemies or overcome obstacles in the way of saving Fairy Tail. Sometimes they bicker while doing so, which adds some humor to the story.
One interesting plot could be that the Fairy Tail members hold a pool party to celebrate a big victory. During the party, there are various fun competitions like the best pool trick competition. Gray might accidentally freeze part of the pool, causing chaos but also lots of laughter.
Natsu could be one of the main characters. Given his love for food, he might be really interested in an eclair in a fanfiction. He could be on a quest to find the most delicious eclair in the Fairy Tail world. Another could be Lucy. She might use her celestial magic to help in a story related to an eclair, like finding a magical eclair that has been hidden by a celestial spirit.
Natsu is often involved. His powerful fire magic could be a key factor in either trying to stop the destruction or, in some cases, accidentally causing more chaos if his power goes out of control. Gray, with his ice magic, might be there to counterbalance Natsu's heat or work together with him to face the threats.
Definitely Natsu. He's always getting into trouble with his brash actions, so he's a prime candidate in punishment scenarios. Then there's Lucy. She's new to the guild in a way and still learning the ropes, so she could easily find herself on the receiving end of a punishment. And of course, Makarov, as the guild master, is often involved in doling out or dealing with punishments for the members of Fairy Tail.
Obviously, Happy is one of the main characters since it's about his death. Natsu would also be very involved as he and Happy are really close friends.
Well, in this 'fairy tail watches the past fanfiction', you can't really leave out the core group. Natsu is a must - his hot - headedness in the past compared to his growth in the present would be a great focus. Lucy, with her celestial spirit magic, could have a unique perspective on the past as she delved deeper into the guild's history. Gray, with his ice - make magic and his past traumas, would be an important character to explore in this context. Erza, the strong and fearless female knight - like character, would surely have a lot to learn from her past self. And Happy would add some light - heartedness to the whole situation as they all watch the past.
Obviously, Happy is one of the main characters since he is in the title. He's a cute and often comical character in 'Fairy Tail'. Natsu would also be likely to be involved. He's Happy's best friend and they are always together in the original series. Their interactions would be a natural fit for a roasting scenario. Lucy might also be part of it. She has a strong personality and could easily get into a roasting battle with the others.
Gray could also play a role. He is another important member of the guild. He might interact with Lisanna in various ways, perhaps in training sessions or during guild missions. His cool - headed nature could contrast with Lisanna's more warm - hearted personality, creating interesting interactions.