The OC could be an outcast in the ninja world. They don't belong to any major clan and are constantly on the move. Hidan might see this OC as an easy target. The OC might have some unique skills, like being able to communicate with animals, but these skills are not enough to protect them from Hidan when he decides to sacrifice them for his own dark purposes.
In a 'Hidan Sacrifices OC' fanfiction, the OC could be a sacrifice to stop some greater evil. Hidan, believing in his twisted way that sacrifice is the answer, chooses the OC. The OC might be an innocent bystander or someone who was in the wrong place at the wrong time. However, the sacrifice could have unforeseen consequences. Maybe it angers other characters in the Naruto universe who then seek revenge on Hidan for his cruel act.
A possible main character could be an OC who is a young and inexperienced shinobi. This shinobi accidentally stumbles upon Hidan's secret sacrificial site. Hidan, seeing this as an opportunity sent by Jashin, decides to make the shinobi his sacrifice. The young shinobi then has to quickly grow and learn to use their latent ninja skills to survive the encounter with Hidan and potentially expose his actions to the ninja world.
Well, it could be about an original character who gets caught up in Hidan's sacrificial rituals. Maybe the OC is a new recruit in the Akatsuki and Hidan decides to use them for his Jashin worship. The OC might have some special power or knowledge that either makes them a prime sacrifice or a target for Hidan's wrath.
Well, if Hidan mistakes an OC (original character) as a Jashin fan, there could be some wild consequences. He might try to involve the OC in his Jashin - related rituals. Since Hidan is extremely devoted to Jashin, he could see this as an opportunity to either convert the OC or use them as a sacrifice. It would be a really chaotic situation for the OC as Hidan is not one to be reasoned with easily when it comes to his beliefs.
The OC could try to explain to Hidan that they are not a Jashin fan. They should be very clear and firm in their statement. For example, they could say something like 'I have no relation to Jashin, you are mistaken.'
I'm not entirely sure specifically as 'hadin sacrifices oc fanfiction' could be very unique. It might be a fan - created story where a character named Hadin makes sacrifices related to an original character (OC). Without reading it, it's hard to say more.
One common theme is the clash of beliefs. Hidan has his extreme religious beliefs, and the OC often has different values. Their relationship then becomes a battleground for these clashing ideas.
It could be a new character created by the author, like a young kunoichi from a small, far - away village. She might have special powers related to nature, like the ability to communicate with animals. This would make for an interesting dynamic when babysitting Naruto, as he's always been curious about different ninja abilities.
The OC could be a mysterious ninja from a far - off land. Sasuke might think this ninja has some secret knowledge about the Uchiha clan that he wants, so he kidnaps them.
I'm not entirely sure as it could be a very specific and perhaps not very common fanfiction. But generally, 'Hidan' might refer to a character from a particular series. The 'sacrifice' part could imply a plot point where a character sacrifices something or someone. However, without more context, it's hard to say exactly what this fanfiction is about.