Fishlegs would be really concerned and would use his knowledge to try and help. He might look for herbs or remedies that could aid in Hiccup's recovery. Snotlout, on the other hand, might initially try to act tough but deep down he'd be just as worried. He might try to show off his strength by helping to carry Hiccup or something like that. And Tuffnut and Ruffnut would be their usual chaotic selves, but also very caring towards Hiccup in their own unique way. They could make jokes to try and cheer him up while he's in pain.
Her friends would likely be very shocked and worried. Some might rush to the hospital immediately and stay by her side, constantly checking on her condition. For example, her best friend might be in tears and refuse to leave until they know Bella is out of danger.
Edward would be extremely distraught. He might blame himself for not being there to protect Bella. He would likely stay by her side constantly, using his vampire abilities to try and heal her if possible. Alice, on the other hand, might have seen the accident coming in one of her visions but was unable to prevent it. She would be filled with guilt and would try to use her visions to figure out how to help Bella recover.
Yamamoto would be more level - headed. He would first try to find out the details of Tsuna's arrest. He might talk to the police or other authorities to see if there's been a misunderstanding. He'd also be a source of support for Tsuna's family during this tough time.
Well, one possibility is that he could end up in the hospital with serious injuries. His friends would be really worried and rush to be by his side. Maybe Toothless would somehow sense his distress and try to find him. It could also lead to some self - discovery for Hiccup as he lies in the hospital bed, thinking about his life and how fragile it is.
Hiccup's friends would be extremely worried. Astrid, being Hiccup's closest friend and love interest, would probably be the first to take action. She would gather the other riders and start planning a rescue mission right away. Snotlout might initially be a bit hesitant, but the thought of losing Hiccup would push him to join in. Fishlegs would use his knowledge of dragons to figure out where Drago might be hiding Hiccup.
His friends would most likely be very concerned. They would probably bring him things like food and medicine. TK might pray for his quick recovery.
Sonic would be devastated. He and Tails are like brothers. Sonic would likely go into a rage and vow to avenge Tails' death. He would immediately start hunting down whoever or whatever was responsible. Amy would be heartbroken as well. She would probably be the one to try to comfort Sonic while also being deeply sad herself. Knuckles would be angry and ready to fight alongside Sonic to seek justice for Tails.
I think Naruto's friends would be quite shocked. For the more traditional ninja like Neji (if he were still alive in this fanfic), he would see the gun as an abomination to the ninja way. However, Naruto's closest friends like Kiba would be more open - minded. Kiba might see it as a cool new weapon and want to see what it can do. But overall, they would all be concerned about how Naruto got the gun and what it means for their world of ninjas.
I think his friends' reactions would be mixed. Kakashi would be that calm and collected presence, giving Naruto some words of wisdom about this new chapter in his life. Hinata might be a bit sad at first because she had feelings for Naruto, but she would also be happy for him. The rest of the Konoha 11 would be excited. They would see it as an opportunity for Naruto to bring about new changes not just in Konoha but in the whole ninja world. They would all gather around to support Naruto and make sure the marriage goes smoothly.
Raven would probably be the first to sense that something was wrong with Beast Boy. She'd be quiet about it at first, but she'd start keeping a closer eye on him. Maybe she'd make him some herbal tea that she believes has healing properties.