Is there any 'Naruto captured and tortured fanfiction' that is appropriate for all ages?
There could be. However, it's important to note that when searching for such fanfiction, one should be cautious. Many platforms have rules against overly violent or inappropriate content. So, you might need to look for fanfictions on more family - friendly platforms or those with strict content moderation. You may find some that deal with the idea of Naruto being captured in a more adventure - like or strategic context, rather than something disturbing.
It's possible. Some fanfiction authors might write about Naruto being captured and facing hardships that could be seen as a form of 'torture' in a way that is more about character development. For instance, he could be captured by an enemy who tries to break his spirit through psychological means rather than physical harm. This can then lead to a story about Naruto finding his inner strength and outwitting his captors.
Yes, there might be some fanfictions that handle such themes in a non - graphic and appropriate way. For example, some may focus on the emotional and mental struggle Naruto goes through during his 'captivity' rather than on torture in a violent sense. These can be more about his journey to overcome adversity and grow stronger.