Other minor characters, like the villagers who know Inuyasha, would be either very grateful if he got hurt while protecting them and try to take care of him. Or they could be a bit fearful if they don't fully trust his half - demon nature and be hesitant to approach him while he's injured.
Kagome usually gets very worried. She'll immediately try to use her spiritual powers to heal him if she can. If not, she'll search for herbs or other ways to help. Miroku would likely offer his support in a more practical way, like finding a safe place for Inuyasha to rest. Sango might be on guard, making sure that no more enemies take advantage of Inuyasha's weakened state.
Simon might be in a bit of a panic. Since he's her friend and also not as used to the dangerous situations as the other Shadowhunters. He'd try to do whatever he can to help, like getting help from more experienced Shadowhunters or trying to comfort Clary while she's in pain.
The other characters' reactions can vary. Pixal, if she's around, would use her technological knowledge to see if there are any internal damages to Jay, especially if it's related to his electrical components. The villagers of Ninjago might also show their support. They could bring food or offer shelter for Jay to recover. The reaction of the villains would depend on the situation. Some might see it as an opportunity to finish Jay off, while others might be impressed by his courage in getting hurt while fighting them.
Thorin would probably be very concerned. Since Bilbo has become an important part of their group, Thorin might feel responsible for his safety. He could order the others to help Bilbo immediately and make sure he gets proper care.
Natasha Romanoff would likely be very protective. She and Clint have a long - standing friendship and partnership. So, she would probably be by his side immediately, using her skills to tend to his wounds if possible, and vowing revenge on whoever hurt him.
Piper might be very worried and use her charmspeak to try and keep Jason calm. Leo could use his mechanical skills to build something to help with Jason's injury, like a makeshift stretcher or a device to monitor his condition. Annabeth would probably come up with a strategic plan to get Jason to safety and figure out how to heal him.
When Hazel gets hurt on the Argo 2 in fanfiction, it's a big deal for the other characters. Each of them has their own way of reacting. Jason, for instance, would use his leadership skills along with Percy to keep the crew in order. Nico, Hazel's brother, would be extremely worried and might even use his powers to try and find a way to heal her if possible. The whole crew would come together, their individual relationships with Hazel and each other playing a role in how they respond to her injury. They would support her both physically and emotionally, showing the strong bond among the characters on the Argo 2.
Anakin, if he's in the story, would likely be very protective. He might rush to her side immediately, using his skills to try and heal her or at least stop the bleeding. His reaction could be full of anger towards the cause of her injury, vowing revenge.
Inuyasha is devastated when Kagome gets hurt. He blames himself, especially if he was supposed to be protecting her. He'll pick her up gently and try to find a safe place to tend to her wounds. He might also call for help from his friends like Miroku or Sango. He'll stay by her side until she recovers, constantly on guard against any further threats.
Splinter, as their sensei and father figure, would offer wisdom and comfort. He might have some traditional methods to help with Donnie's pain and healing. And he would also use this as a teaching moment for all of his sons about the importance of caution and looking out for each other.
Other characters' reactions can vary widely. Some of the more empathetic classmates, like Tsuyu, might offer words of comfort and stay by his side. Mineta might be a bit more cowardly, but still show some concern. The teachers, such as Aizawa, would take charge of the situation. Aizawa would ensure Midoriya gets proper medical attention and also start an investigation if the injury was due to foul play. His mother, if she were to find out, would be extremely worried and rush to be by his side as soon as possible.