Well, perhaps they would first meet in a strange and magical place. Harry might be on one of his adventures in the wizarding world and suddenly find himself in Jareth's realm. Jareth, being his half - brother, could be initially hostile or at least very guarded. He may not trust Harry easily, thinking he has come to disrupt his world or claim some sort of power.
Another aspect could be the reactions of their respective friends and allies. Harry's friends from Hogwarts might be very suspicious of Jareth, while Jareth's minions or associates might not welcome Harry either. There could be a lot of tension between the two groups as they try to figure out if this new relationship between Harry and Jareth is a good or bad thing. It could also lead to some really interesting character development for both Harry and Jareth as they navigate these new relationships and the expectations that come with being half - brothers.
Maybe there is a prophecy or an ancient magic that ties them together. This could be the driving force behind their meeting and the subsequent events in the fanfiction. The prophecy could foretell that together they will either save or destroy their worlds. This would put a lot of pressure on both of them, especially Harry who is already used to having the weight of the wizarding world on his shoulders. They would have to learn to trust each other and work towards a common goal, despite their differences.
The fanfiction could also explore how their shared family history affects their fates. There could be an overarching plot where a common enemy or a long - lost family secret threatens both of them. Harry might be initially reluctant to accept Jareth as his half - brother due to Jareth's somewhat menacing reputation. However, as the story progresses, they could learn to work together, combining their unique magical abilities to overcome the challenges in their path.
One possibility is that there would be a lot of unresolved tension between them. Jareth, with his mysterious allure, might initially be cold towards Sarah, but deep down still hold feelings for her. Sarah, on the other hand, would likely be both fearful and curious. She might be more confident this time around, having grown since her first encounter in the labyrinth. Their reunion could spark a new adventure, with Jareth trying to tempt Sarah once again, but this time she could be more resistant, leading to a power struggle of sorts.
In a fanfiction, Harry could bet Draco half a galleon that he can make Hagrid laugh within five minutes. Draco doesn't think Harry can do it as Hagrid is often a bit gruff. But Harry tells Hagrid a really funny story about his first encounter with a magical beast in the Forbidden Forest. Hagrid bursts out laughing, and Draco has to hand over the half - galleon. This could lead to Draco being more interested in Harry's adventures and maybe even wanting to be part of them in some way.
The half - brother could be developed as a character with a troubled past. He might have been ostracized in his own community because of his relation to Naruto or his own unique abilities. This could make him initially cold and distant but as he interacts with Naruto, he could gradually open up and become more warm - hearted.
In such a fanfiction, Harry could discover the world of Greek mythology. Maybe he'd meet demigods and learn about their powers. He might also compare his magic from the wizarding world with the powers of the demigods at Camp Half - Blood.
Well, Naruto's positive attitude would likely have a huge impact on Madara. He might be able to stop Madara from becoming so bitter. Madara might end up being more like Naruto, believing in the goodness of people.
Well, Ash could be invited to Dawn's home and meet her brother there. Her brother might be a collector of rare Pokémon items, and Ash could be really interested in seeing his collection. This could lead to an exciting moment where Ash discovers a new item that could potentially help him in his future battles.
Well, Ruby could be a healer. Naruto's brother might get seriously injured in a battle, and Ruby uses her healing powers to save him. This creates a bond between them, and they start to train together. Ruby teaches him some new techniques she has, and he in turn shows her the ways of the ninja in the Naruto world.
Well, Harry might find himself in a time when James' brother was at Hogwarts. He could witness their school days and how the family dynamics were different back then. Harry could form an unexpected friendship with James' brother, which would give him new insights into his father James and the entire Potter heritage.
It could be about the complex relationship between Aro and his half - brother Baldo. Maybe they start off with some rivalry due to family issues, like competing for their family's attention or inheritance. Then as the story unfolds, they gradually come to understand each other and form an unexpected bond.