One way for the kidnapped character to escape is by outsmarting Sasuke in a battle of wits. If they can make Sasuke believe that they are more useful to him alive and free, he might let them go. They could also try to form an alliance with other forces that are against Sasuke's actions. For instance, if there are other ninjas who are looking for the kidnapped character, they could coordinate with them to create an opportunity for escape. Additionally, the kidnapped character could try to gain Sasuke's trust over time and then use that trust to their advantage when the time is right.
The kidnapped character could use their own hidden jutsu skills to break free. For example, if they have a teleportation jutsu they've been hiding, they could use it when Sasuke is distracted. Another way is to appeal to Sasuke's emotions. If they can remind him of his better nature or a past event that made him more empathetic, he might let them go.
They could use their ninja skills. Sasuke might use his Sharingan to find weaknesses in their captors' defenses, and Sakura could use her superhuman strength to break through any physical barriers. Maybe they work together to create a diversion and then make a run for it.
They might find an ally within the place where they are held. There could be another being there, maybe an angel who doesn't agree with Castiel's actions, or a human who has also been captured by Castiel in the past and knows the layout well. Together, they could come up with an escape plan.
Hinata could use her Byakugan to find weaknesses in Sasuke's defenses. Maybe she spots a chakra - based trap that she can manipulate to create a distraction and then make her escape. She could also use her Gentle Fist techniques in a creative way, like redirecting Sasuke's attacks back at him to create an opening for her to run.
Sakura could use her medical ninjutsu skills to create a distraction. For instance, she might make it seem like she's poisoned herself, causing Sasuke (or whoever is involved in the kidnapping) to get closer, and then she could attack and escape.
The kidnapped character might first show fear, especially if they don't understand Spock's motives. But then, they could start to analyze the situation. If they are a scientist or an engineer, they might try to use their skills to find a way out. They could try to disable the ship's systems that Spock is using to keep them captive. And if they have some knowledge of Vulcan culture, they could try to appeal to Spock's sense of honor and loyalty to Vulcan values, perhaps by reminding him of the importance of non - aggression and respect for life.
Tim could look for any weaknesses in the outlaws' security. Maybe there's a loose board in the room he's locked in that he can use to create a distraction or as a weapon.
She could also pretend to cooperate with Orochimaru at first. Gain his trust a little bit and then when he least expects it, make her move. Maybe she could ask Orochimaru for some tools or access to certain areas under the pretense of helping him with his work, but in reality, she is setting up her escape.
One way could be to win the trust of the pirate's crew. Maybe by helping with the daily tasks on the ship, like cooking or mending sails. Then, when they least expect it, you could steal a small boat and make your escape. Another option is to use your charm on the pirate himself. Pretend to fall in love with him and then, when he lets his guard down, find a way to get away.
Naruto could try to befriend some of the Kumo ninjas who might not be in favor of the kidnapping. By winning them over, they could help him escape. Also, he could use his knowledge of ninja techniques and his quick thinking. For example, he could use substitution jutsu to switch places with an object when the guards are not looking and then make a run for it.
Percy could look for any weaknesses in the wizards' magic or their security. Maybe there are certain times of day when their spells are less effective. He could also try to befriend a less - strict wizard who might be willing to help him escape.