Alex is very likely to be one of the first to help Kara. As her sister, she has a deep bond with Kara and would do anything to protect her. Alex has medical training and combat skills, so she can both treat Kara's injuries and defend her if needed. Another character would be Winn. He is a tech - genius and could use his knowledge to create something to help Kara heal faster or to find a way to counter whatever caused her injury. Also, J'onn J'onzz, with his shape - shifting and telepathic abilities, could be a great asset in protecting Kara while she's injured and in helping her recover mentally as well as physically.
The relationship would likely become more intense. They would have to rely on each other more, and their bond would deepen as they are about to become parents. Inuyasha would probably become more protective of Kagome.
Peter was running through the forest when he suddenly tripped over a hidden root. Pain shot through his ankle as he tumbled to the ground. His friends, who were a little ahead, quickly rushed back to him. 'Peter, are you okay?' one of them asked, concern etched on their faces. Peter winced and tried to stand but couldn't put weight on his injured ankle. They decided to make a makeshift splint using branches and some cloth they had. As they worked on it, Peter gritted his teeth, trying not to cry out from the pain.
Perhaps Sam gets hurt while trying to protect a civilian. He jumps in front of a werewolf's attack meant for someone else. This would show his selfless nature. The local hunters in the area might not trust Sam and Dean at first, but seeing Sam's sacrifice could change their minds, adding an interesting dynamic to the story.
In a fanfiction scenario where Blossom gets hurt in the PPGZ and RRBZ world, there could be many implications. Her injury could make the city more vulnerable as she is one of the main protectors. The other characters would have to deal with their own emotions. Bubbles might be scared and in denial, while Buttercup could be angry and determined to find who's responsible. Meanwhile, the Rowdyruff Boys might see this as an opportunity to prove themselves as more than just villains, perhaps by helping the PPGZ find a cure or a way to heal Blossom.
In the fanfiction, it might be someone from his own team. Maybe there's a new member who is insecure and feels that Kuroko is getting too much attention. So, in a fit of jealousy, this person does something that causes Kuroko to get hurt, like tampering with his equipment.
It could be an enemy from the underworld. Maybe a powerful demon or a vengeful spirit that has a grudge against her. They might use their dark powers to harm her, like sending a bolt of dark energy her way.
It could be a new villain that has emerged. This villain might have some sort of vendetta against Steven specifically, perhaps because of his unique powers or his role in the gem world.
Perhaps it's a mysterious figure in the fanfiction world. This unknown character could have some ulterior motives against Jacob and find ways to hurt him, like setting traps for him.