One idea could be creating an OC who is a master hacker. In the chaos of the 'Highschool of the Dead' world, this OC could use their skills to hack into security systems, gather information about the zombie hordes or even try to find a possible cure. For example, they might hack into a military base's communication system to see if there are any rescue operations planned.
A great 'Highschool of the Dead' Saeko x OC fanfiction often has a well - developed OC. The character should have unique traits, goals, and a believable backstory. For example, if the OC is a survival expert, it should be shown how they acquired those skills.
The OC can be given special physical abilities. For example, being extremely fast or having great strength. This would help in situations like escaping from zombies or fighting off attackers. In the story, the OC could use these abilities to save Shizuka from dangerous situations, showing his or her strength.
One great 'Highschool of the Dead' male OC fanfiction is 'Surviving the Apocalypse'. It has a well - developed male OC who uses his unique skills to help the group survive. The story also has great character interactions and a lot of exciting action scenes.
One possible storyline could be that the OC is a new student who quickly befriends Shizuka. They end up having to rely on each other during the zombie apocalypse. For example, the OC might have some unique survival skills like being able to find hidden shelters, and Shizuka uses her medical knowledge to keep them healthy. Together, they form a strong bond and help other survivors as well.
A possible fanfic could involve the OC being a scientist who teams up with Shizuka. They might be working on a cure for the zombie virus. Their relationship could develop as they face various challenges and close calls with the undead. This would bring out different sides of both characters.
Focus on character development. Make your OC have a distinct personality, backstory, and motivation. For example, if your OC has a fear of losing their family which drives them to be extra brave in the face of zombies. This makes them more relatable and interesting.
Naruto's experience in dealing with tough opponents in his own world would help him in the zombie - filled Highschool of the Dead. He would be able to quickly analyze the situation, figure out the weaknesses of the zombies, and come up with effective plans. His friendship - first approach might also lead to some interesting relationships with the other characters in this new and dangerous world.
An OC (Original Character) in a Highschool DxD fanfiction having the Rinnegan could be an extremely powerful and unique addition. The Rinnegan, from the Naruto universe, brings a whole set of abilities like the Six Paths powers. In the context of Highschool DxD, this OC could use these powers in various ways. For example, the ability to see chakra could be translated into seeing the magical energy in the DxD world. They could use the gravitational powers of the Rinnegan to manipulate the environment during battles against devils, angels, or fallen angels. It would make for a very interesting and overpowered character in the Highschool DxD fanfiction setting.
Survival is a very common theme. Given the zombie apocalypse setting, characters are constantly fighting for their lives, looking for food, shelter, and ways to avoid being bitten. Another theme is friendship. In these fanfictions, friends stick together through thick and thin. They support each other and often have to make sacrifices for one another.