At first, Naruto might be in shock. He has always trusted his friends, so the sudden betrayal would be a huge blow. He could be silent, unable to process what has just happened.
Sakura might be a bit surprised at first. But she would probably be happy for Naruto as long as he is happy. She might also be curious about the elf and want to learn more about her. Sasuke would likely be more reserved in his reaction. He might not show much emotion on the surface but deep down he would be glad that Naruto has found someone. Kakashi would probably give Naruto some sage advice about making a relationship work, especially since it's with someone from a different species.
Sakura might be shocked at first. She has always known Naruto as a regular ninja. But she could also be concerned and try to find a way to help him control his vampire side. Sasuke would probably be more cautious. He'd see Naruto as a potential threat, but also might be interested in how Naruto combines his ninja and vampire powers. Kakashi, on the other hand, would be calm and start observing Naruto to understand what has happened and how it affects the village.
Shikamaru would be annoyed at first, thinking that Naruto has gotten them into another troublesome situation. But he would soon realize the potential benefits of having the baby dragon around, like using its abilities for strategic purposes in battles or for the overall protection of the village.
Sakura might be a bit skeptical at first. She would worry about the potential danger the dragon could pose to the village. But once she sees how Naruto is able to handle it and how the dragon is friendly, she would warm up to it. Sasuke, on the other hand, would be more interested in the dragon's power. He might see it as a tool to gain more strength, but Naruto would teach him that the dragon is a friend, not a weapon.
Sakura might be extremely angry and feel guilty for not being able to protect Naruto. She could immediately start planning ways to rescue him and make Danzo pay for what he's done.
If Naruto gets captured by Orochimaru in fanfiction, his friends' reactions would be intense. Hinata, who has deep feelings for Naruto, would be heartbroken but also very determined. She might try to secretly track Orochimaru on her own at first, using her Byakugan to search for Naruto. Kiba with Akamaru would be eager to jump into action, using their tracking skills. Lee would be excited to prove his strength and save Naruto, ready to use his Taijutsu skills against Orochimaru. His friends' combined efforts would be focused on rescuing Naruto from Orochimaru's clutches as soon as possible.
At first, Naruto would be in disbelief. He has always trusted his friends wholeheartedly, so this would be a huge blow. He might then feel a deep sense of anger and sadness. However, Naruto being Naruto, he would likely also start to look for ways to prove his innocence or the misunderstanding. He might go on a journey of self - discovery to figure out what went wrong and how he can win back his friends' trust, all while dealing with the pain of the betrayal.