One common theme is the struggle for the oc against the yandere Naruto's possessiveness. For example, in many stories, the oc is an independent character who values freedom, but Naruto's yandere nature tries to restrict that. Another theme is the exploration of Naruto's character transformation. Normally he is seen as a bright and friendly character, but in these fanfics, his yandere side brings out a darker, more obsessive part of him. There's also often a theme of secrecy and danger, as the oc may be afraid to expose Naruto's true nature to others in the village.
One popular 'oc and yandere Naruto fanfiction' is 'The Yandere's Obsession'. In this story, the original character (oc) gets caught in the web of a yandere Naruto. It's really interesting as it shows a different side of Naruto's character, more possessive and intense. Another one could be 'Oc in the Yandere Naruto's World'. It has great character development for the oc as she tries to navigate the dangerous affections of a yandere Naruto.
First, develop your characters well. Define the yandere's traits clearly, like their possessiveness and obsessive nature. For the oc, give them unique qualities. Then, create a plot that revolves around the yandere's fixation on the oc. Maybe start with a chance encounter that sets off the yandere's interest.
In a fanfiction, Naruto could be training in a secluded area and Yandere Koneko stumbles upon him. She immediately falls for his spunk and the fact that he doesn't give up easily. Yandere Koneko then tries to insert herself into Naruto's life by bringing him food and small gifts. Naruto is initially confused but then realizes she has a rather extreme way of showing affection and has to gently set boundaries.
One idea could be that Naruto somehow gets trapped in a dimension where Kaguya has become a yandere for him. She tries to keep him there all to herself, while Naruto has to figure out a way to escape and also deal with her obsessive behavior.
One common theme is possessiveness. The yandere characters in these fanfictions often show extreme possessiveness over Naruto or other characters. For example, they might not allow the object of their affection to be around other people.
Well, 'Twisted Love' is also a great yandere x oc fanfiction. Here, the yandere's love is not the normal kind. It's a mix of adoration and a dangerous need to control the oc. The story plays with the psychological aspects of this abnormal relationship, exploring how the oc copes with the yandere's overbearing presence.
Naruto might be initially confused. He's used to people being friendly or at least straightforward with their intentions. So when Mikoto starts showing her yandere side, like getting overly possessive, Naruto would probably be like 'What's going on?'. He could try to talk to her and understand her behavior at first.
Naruto would probably be really confused at first. He's used to a loving mother figure, not a yandere one. He might try to talk to her and understand why she's acting so strangely.
Maybe the fanfiction could start with Kushina being resurrected in some way and immediately developing this yandere love for Naruto. Naruto, being the kind - hearted person he is, tries to understand her but is constantly baffled by her extreme behavior. For example, she gets jealous when Naruto spends time with his sensei, Kakashi, and tries to sabotage their training sessions.