A new, original character could be a great main character too. For example, a young scientist who was on the verge of finding a cure for a major disease before the apocalypse. When reborn in the walking dead world, they could use their scientific knowledge to try and find a cure for the zombie virus. This would add a fresh perspective to the story and open up a lot of new plot possibilities.
Michonne would also make a great main character for such a fanfiction. If she were reborn, she could use her sword - fighting skills in new and unexpected ways. Maybe she's reborn in a situation where she has to train others to fight the zombies, or she discovers a new type of weapon that she can combine with her sword skills for even more effective combat.
Michonne could be the main character. She is a strong and resourceful woman. In a Christmas story, she could be the one who uses her skills to protect the group during their Christmas celebration. Maybe she has to fend off a large group of walkers that are attracted by the noise of their celebration. Her actions would not only save the group but also show the true meaning of survival and togetherness during the holiday in the Walking Dead world.
Another possibility is Draco Malfoy. He was always in a difficult position, being from a Death Eater family but having some doubts. In this fanfiction, he could be in a situation where he's made some bad choices and now feels like he's a 'dead man walking' as he tries to find a way to make amends or escape the consequences. He has to walk a very thin line between life and death, both literally and figuratively in the wizarding world.
There could be a new type of hybrid creature that is a result of the combination of the zombie virus and some supernatural element from Bella's world. This hybrid could be extremely powerful and unpredictable, and it sees both humans and zombies as a source of food or something to dominate, making it a very dangerous antagonist in the fanfiction.
Obviously Naruto could be one of the main characters. He would bring his unique abilities and his never - give - up attitude. Another could be Rick from The Walking Dead. His leadership skills combined with Naruto's power would make for an interesting dynamic. They could learn from each other and lead the survivors in different ways.
Morgan from 'Fear the Walking Dead' and Rick from 'The Walking Dead' would be an interesting pairing. Morgan has his unique philosophy on life and death, and Rick is a natural leader. Their different leadership styles could either clash or complement each other in a crossover scenario.
Rick Grimes was a major fictional character. He was the leader of the group and went through many challenges in the series.
They would need to become more aware of their surroundings. Listen for any sounds that might indicate zombies or other threats.
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.
Obviously Naruto would be one of the main characters. Depending on the plot, Sasuke could also be involved, either as a helper or an obstacle. Sakura might also play a role, perhaps as a healer trying to save Naruto. There could also be new characters created specifically for this fanfiction, like a dark figure who is responsible for Naruto's 'dead man walking' situation.
Well, clearly Beth and Carl are the main characters. Beth was known for her kindness and musical talent in the original show. Carl was Rick's son, a young boy growing up in the apocalypse, learning how to survive and protect his family.