Well, one interesting concept could be how the OC (Original Character) being immune affects the group dynamics. It might create jealousy or a sense of hope. For example, if the group is constantly facing threats from the walkers and the OC is immune, they might see the OC as a key to finding a cure or a way to safety.
Another concept could be the origin of the OC's immunity. Is it genetic? Or was it due to some prior exposure to something that the others in the Walking Dead world haven't been exposed to? This could lead to all sorts of storylines, like scientists in the group trying to study the OC to replicate the immunity.
Since it's an OC fanfiction, the main character is likely the Original Character who is immune. But there could also be other characters from the Walking Dead universe that interact with the OC. Maybe Daryl, who is known for his survival skills, could be involved. He might be initially skeptical of the OC's immunity but later come to rely on it.
In The walking Dead comics, there's no explicitly mentioned character who is immune. The focus is more on survival and the challenges faced by the group rather than immunity.
One interesting storyline could be an OC (Original Character) who has a unique survival skill like being able to quickly build hidden shelters. This OC might use their skill to protect a group of survivors from a horde of walkers. Another could be an OC with a medical background who tries to find a cure for the zombie virus within the world of The Walking Dead.
In 'dead man walking naruto fanfiction', it might explore the idea of redemption. A character who has made many mistakes in the past, like a 'dead man' in terms of their moral standing, could be trying to walk a new path in the world of Naruto. They could be seeking forgiveness from those they've wronged while also trying to use their skills for good this time.
One interesting concept could be a character who is in a seemingly hopeless situation, like a 'dead man walking', but then finds new strength or purpose within the magical world of Harry Potter. Maybe they are wrongly accused and have to fight against the odds to clear their name, similar to how Harry often faced unjust accusations.
One interesting storyline could be the oc kid's struggle to find their place in the post - apocalyptic world. They might have to learn survival skills quickly while also dealing with the emotional trauma of losing their family. Another could be their encounter with a group of survivors who initially don't trust them but eventually become like family.
Perhaps an OC who is a young child with an uncanny ability to sense danger before it arrives. This could add an interesting dynamic to the group as they try to protect the child while also relying on the child's special ability to avoid walker herds and other threats.
An OC who was a streamer before the apocalypse. In the 'the walking dead' world, they try to keep their spirits up by pretending they are still streaming. They document their survival journey as if they are doing a special 'real - life zombie apocalypse' stream. They might even gain a following among other survivors who find their positive attitude inspiring.
One idea could be an OC who has a unique skill like being able to communicate with animals in a limited way. This could help the group in various situations, like warning them of approaching herds. Another could be an OC who is a master of disguise and uses this to infiltrate enemy groups within the Walking Dead universe. For example, they could pretend to be a member of a hostile group to gather intel.
A great plot for a 'Walking Dead OC fanfic' could be an OC who has a photographic memory. This OC could remember all the pre - apocalypse survival knowledge they read in books or saw on TV. They could recall details about building shelters, finding water sources, and making weapons. Their ability could make them a valuable asset to the group, but also a target as other groups might want to use their knowledge for their own survival. They would constantly have to balance between helping their group and protecting themselves from those who would take advantage of them.