It's also possible that there is another zombie who is Zed's friend or rival. This character could play a significant role in the story, either being involved in the situation where Zed gets hurt or having an impact on Zed's recovery or further actions.
Since it's about Zed getting hurt, it's very likely that Zed is one of the main characters. He is the focus as the one who experiences the pain.
There could be other important characters as well. For example, if there are humans in the story, the leader of the human group might also be a main character. This person could be the one who either causes Zed's hurt or helps him afterwards.
Maybe he gets hurt by other zombies during a fight for food. In a post - apocalyptic world of zombies, resources are scarce and zombies can be very aggressive towards each other.
Love is a very common theme. Their relationship, which is a mix of the zombie and human worlds, is often explored in great detail. For example, how they overcome the differences between their two species to be together.
A common theme is friendship. In many fanfictions, Zed and Bucky start off as not getting along well, but as they face the challenges of the zombie - filled world, they develop a deep bond of friendship. Another theme is loyalty. They might have to be loyal to each other in order to survive against the zombies and other threats.
In some fanfictions, it could be a new character, perhaps a young and brilliant inventor who idolizes Iron Man. This person discovers Iron Man's injured state and uses their own unique skills and knowledge, which they've developed while studying Iron Man's technology, to nurse him back to health.
Maybe in a fantasy fanfiction, an evil sorcerer is the villain. Christy might be a key figure in a prophecy to save the kingdom. So, the sorcerer tries to stop her by casting a spell that makes her get hurt. He doesn't want her to fulfill her destiny and will do whatever it takes to keep her from being a threat to his power.
A new emerging criminal who has a grudge against technology and those who use it to catch criminals. Garcia, being the tech genius, would be a prime target for them. They could plan an elaborate scheme to hurt her and disrupt the BAU's work.
It might be an accident - causing character. This could be someone who is clumsy or irresponsible. Their actions, even if not intentional, end up causing harm to Judy. For example, they might accidentally start a fire in a place where Judy is, and she gets burned in the process.
Sometimes, it could be due to her own actions. Lydia might be overconfident and take risks that she shouldn't. For instance, she could try to perform a very difficult and dangerous magic spell without proper training, and it backfires, causing her to get hurt.
It could be a villain in the fanfiction. Maybe a new, powerful vampire who has a vendetta against Bella or her friends.
There are also the possibility of some inter - dimensional beings. In the Ben 10 universe, there are many different dimensions. If a being from another dimension comes through with the intention of causing chaos, they could target Ben. They might have powers that are completely foreign to Ben and his allies, making it difficult for him to defend against them. And let's not forget about the possibility of some of Ben's old enemies teaming up. If they work together, they could come up with a plan to really hurt Ben, whether it's physically or by ruining his reputation among the people he protects.