If Hans kidnaps Anna in a fanfiction, Elsa would initially blame herself, thinking it's because of her powers that Anna is in danger. She would then turn her self - blame into determination to save her sister. Kristoff would immediately start planning the rescue. He'd gather all the resources he can. Olaf would be there for moral support. Sven would be Kristoff's loyal companion in the journey to rescue Anna. The trolls might also get involved, using their ancient knowledge to help find Anna.
Elsa would be extremely worried and angry. She would probably use her powers without hesitation to find Anna. Kristoff would be very determined to rescue Anna. He loves her and would do anything to get her back. Olaf might not fully understand the situation at first but would still try to help, like using his cheerfulness to keep Anna's spirits up while she's kidnapped.
In such a fanfiction scenario, Elsa's reaction would be intense. She might go into a bit of a rage, which could make her powers go a bit out of control. But she would quickly focus on finding Anna. Kristoff would be in a state of panic at first, but then he'd become very strategic. He'd think about all the places Hans could have taken Anna. Olaf would be trying to make light of the situation, saying things like 'Oh, we'll find her soon, don't worry!'. And the other characters in Arendelle would be in shock and would offer whatever help they could to Elsa and Kristoff to get Anna back.
The story could end with Anna being rescued by Elsa and Kristoff. They could overpower Hans and lock him up for his crimes. Anna would then be reunited with her sister and the people of Arendelle, and they would all live happily ever after.
One plot idea could be that Hans' true motives are revealed to be part of a larger scheme to take over Arendelle by using Anna as a hostage. Another could be that Anna manages to outwit Hans during the kidnapping through her kindness and understanding, making Hans question his own actions. Maybe in the fanfiction, Kristoff and Sven come to the rescue and there's an epic showdown in the mountains.
Elsa's reaction would be complex. She has spent most of her life in isolation, fearing her own powers. A kiss from Hans would be something she never expected. She might feel a sense of betrayal towards her sister Anna at first, since Hans had once tried to harm Anna. But as she realizes her own feelings, she would have to face her inner demons. Hans would be elated at first, but then he would quickly realize that he has a long way to go to earn Elsa's trust. He would need to prove that he is a changed man, and the kiss would be the start of that journey of proving himself.
Well, one possible plot could be that Hans kidnaps Anna with the intention of using her as a bargaining chip against Elsa. He might take her to a remote location. Then, Kristoff could find out and go on a heroic rescue mission with Sven. Along the way, he might face various obstacles set up by Hans' minions.
Olaf would try to make Anna laugh. He would tell his silly jokes and do his goofy dances. He would also try to keep Anna warm with his carrot nose. He might even build a small snowman inside the room to keep Anna company when everyone else is busy.
In a different version of the story, Anna and Hans were forced to work together to save Arendelle from a new threat. A powerful sorcerer had cast a dark spell over the land. Anna knew that despite their past, Hans had certain skills that could be useful. 'Hans, we need to put aside our differences for the sake of Arendelle,' she said. Hans agreed. As they journeyed together, they started to understand each other better. Along the way, they faced many challenges and with each one, their relationship evolved. In the end, they managed to break the spell and in the process, a new kind of bond formed between them.
Naruto would be extremely enraged. He would vow to rescue Sakura no matter what. He would immediately start gathering his friends and form a rescue team. Sasuke, on the other hand, might initially seem more reserved but would also be determined to get Sakura back. He would use his Sharingan skills to track Madara.
Some characters might be critical. Elsa, being a powerful and responsible character, might not like it if the fanfiction misrepresents her in a way that goes against her values. She might think that the writers should be more respectful of her character arc and not make her do things that are completely out of character just for the sake of a wild story. However, at the same time, she might also appreciate the creativity in some parts.
Well, Anna would be frantic. She'd immediately set out to find Elsa, not caring about the danger. She might even team up with the Guardians without hesitation. Kristoff would be right by Anna's side, using his survival skills to try and track down Pitch's location. Olaf, being the innocent and loving character he is, would be heartbroken. He might try to cheer Elsa up from afar by singing or reminiscing about their good times, hoping it reached her somehow. The trolls, if they found out, would offer their wisdom and perhaps some magical aid to help in the rescue of Elsa from Pitch's clutches.
Ron would be furious. He would immediately start looking for Ginny and would probably want to confront Harry without thinking. Hermione, on the other hand, would be more rational. She would try to figure out why Harry would do such a thing and look for clues. The Weasley parents would be extremely worried and would likely reach out to all their contacts in the wizarding world for help.