Maybe the OC is a healer from a non - Jedi affiliated planet. Obi - Wan gets injured during a battle and is taken to the OC's planet for treatment. As he recovers, he discovers the OC's natural connection to the Force, which is different from the Jedi way. They start to exchange knowledge about the Force, and their relationship grows as they face challenges from the planet's traditionalists who don't trust Jedi.
One idea could be that the OC is a young Jedi in training and Obi - Wan becomes their mentor. They go on a mission together to a planet on the Outer Rim where they encounter a new Sith threat. The OC has a unique Force ability that Obi - Wan helps them to develop further, and in the process, they form a deep bond of friendship that could potentially turn into something more.
One idea is that Obi - Wan could be influenced by a powerful dark side entity. This entity could be a long - forgotten Sith spirit. It slowly corrupts his mind, making him question the Jedi teachings. He starts to see the Jedi's pacifism as a weakness. Another plot could be that Obi - Wan is framed for a heinous crime within the Jedi Order. Feeling betrayed by his own kind, he turns to the dark side to seek revenge.
Another plot could involve Obi - Wan traveling to the future. He might see a world where the Jedi have been completely wiped out and he has to find a way to bring them back. He could discover new Force abilities or meet descendants of the Jedi who have been hiding their powers all this time. This would be a great way to explore a different kind of Star Wars universe.
One interesting concept could be a crossover with the Star Trek universe. Imagine Obi - Wan using the Force in a world where technology and different species co - exist in a more scientific - based way. Another concept might be a crossover with the Lord of the Rings. Obi - Wan could bring his Jedi skills to Middle - earth and interact with the wizards and warriors there. Also, a crossover with the Harry Potter universe could be cool, with Obi - Wan teaching the young wizards about the Force which could be seen as a different form of magic.
In some 'dark Obi - Wan Kenobi fanfiction', he could be corrupted by a Sith Lord who manipulates his past traumas. The Sith might use his memories of the Clone Wars and his losses to push him towards the dark side. Obi - Wan would then have to fight not only the external influence but also his own demons as he descends into a darker version of himself.
There might be a fanfiction where Obi - Wan's reaction to the destruction of the Jedi Order is explored in great detail. It could involve his efforts to save as many Jedi as possible and his feelings of guilt and determination at the same time. He might have to make some really tough decisions, and the fanfiction could show how he copes with all that.
Well, a really interesting Obi - Wan Kenobi x Reader fanfiction I read had the reader as an alien from a species not well - known in the Star Wars universe. They meet Obi - Wan on a mission to a far - flung planet. The story was great because it explored how their different cultures and backgrounds affected their relationship. It also had a lot of action as they fought against a common enemy. You can also look for stories that focus on the emotional connection between the two characters, like how they support each other through difficult times in the Jedi Order.
One common theme is forbidden love. Since Obi Wan is a Jedi, his relationship with Satine goes against the Jedi Code, so many fanfictions explore this struggle between love and duty.
One interesting plot twist is when the magic in Harry Potter's world starts to affect the Force in Obi - Wan's world and vice versa. So, spells start to have an impact on the Jedi's abilities and the Force starts to influence magic in unexpected ways. This creates a whole new set of challenges and opportunities for the characters, and it makes for a really engaging read as the two systems of power interact in unforeseen ways.
The different types of characters he could fall in love with make it interesting. Whether it's another Jedi, a civilian, or an alien, each brings a different dynamic to the story. For example, if it's another Jedi, they can understand each other's connection to the Force better. If it's a civilian, there's the aspect of introducing the Jedi world to someone outside of it.
One idea could be a scenario where Obi - Wan is captured by the Sith. His hands are bound, but he uses the Force to communicate secretly with his allies. He might try to outwit his captors through his Jedi wisdom and mental strength.