Well, one possibility is that Cloud's friends would immediately start a rescue mission. They might track Sephiroth's usual hideouts. Since Sephiroth is a powerful foe, they would have to be very strategic.
Maybe Sephiroth has some ulterior motives for kidnapping Cloud. It could be related to a power he thinks Cloud has or some past event between them. Cloud, on the other hand, would probably be trying to find a way to escape while being held captive.
In a fanfiction scenario like this, the story could take many twists. For example, Sephiroth might try to brainwash Cloud to join his side. But Cloud's strong will and his connection to his friends could help him resist. Also, the writer could introduce new characters or elements from the game's lore to add more depth to the situation.
Sephiroth might use Cloud to gain some sort of leverage against their common enemies. Or perhaps he wants to extract some information from Cloud. It's all very mysterious.
One possibility is that Gohan's friends and family, especially Goku, would immediately start searching for him. They would use all their powers and resources to track Vegeta's whereabouts. Goku might be enraged and ready to fight Vegeta to get his son back.
Next, Eren could try to escape. Given his strong will, he won't just sit there and accept being kidnapped. He might use his titan powers in a creative way to break free from Levi's clutches.
Well, in a fanfiction where Captain Hook kidnaps Wendy, one possibility is that the Lost Boys come to her rescue. They might use their knowledge of the island and their unique skills to outwit Hook and his pirates.
Another aspect could be the emotional turmoil for the other Avengers. They would surely be scrambling to find Tony. Captain America might feel especially guilty, considering their past differences. The team would have to put aside their differences completely to rescue Tony. They might start by gathering intel on Thanos' whereabouts and formulating a plan that involves their unique skills. For example, Black Widow could use her espionage skills to infiltrate Thanos' base, while Thor could provide the brute force needed in a direct confrontation.
One possibility is that Naruto's friends would immediately launch a rescue mission. They would likely gather intel about Kumo's motives and whereabouts. For example, Sasuke might use his Sharingan to track any clues left behind. Sakura would prepare medical supplies in case of injuries during the rescue.
One possibility is that her friends, like Percy, would immediately start a rescue mission. They would likely gather all the resources and allies they could find. Maybe they'd consult the Oracle for some clues on where Kronos has taken Annabeth.
Well, one possibility is that Goku's friends would immediately start a search and rescue mission. Vegeta, being his rival but also an ally, would probably be at the forefront. He'd be furious that Broly dared to kidnap Goku. They'd likely track Broly's energy signature to wherever he's taken Goku. Another thing could be that Goku, while kidnapped, tries to reason with Broly. Maybe he discovers that Broly has some deeper issues or motives for the kidnapping that could potentially be resolved through conversation.
Perhaps Madara has some ulterior motives for kidnapping Hinata. He might want to use her as a bargaining chip against the Hidden Leaf Village. Or he could be interested in her unique abilities. In that case, the Hidden Leaf would have to decide whether to meet Madara's demands or try to outwit him to get Hinata back safely.
Well, one possibility is that Elena's friends would immediately start a search party. Damon, for instance, would be furious and stop at nothing to find her. He might enlist the help of Stefan and Bonnie. They could use Bonnie's magic to try and track Klaus' whereabouts.