One interesting concept could be the unique ways characters use the possession jutsu. For example, they might use it to gain knowledge from the possessed. Another concept could be the moral implications of using such a powerful jutsu, like whether it's right to invade someone's mind.
Naruto himself is often involved. Since he has a strong will, it's interesting to see how he would deal with being possessed or using the possession jutsu. Sasuke is another common character. His dark past and powerful abilities make for great storylines when combined with possession jutsu.
Well, in fanfiction, the rules can vary widely. Some writers might keep it similar to the original Naruto series where it requires a certain level of chakra control. But others may change it up. For example, they could make it so that the possession can only happen between characters with a certain emotional bond.
In fanfiction, the Naruto Possession Jutsu can be portrayed in various ways. Sometimes it's used for comical effects, like a character accidentally possessing the wrong person. For example, Naruto might end up in Sakura's body and have to deal with all the girly stuff she does, which can lead to really funny situations.
One idea could be a fanfic where a young ninja discovers a unique way to combine lightning jutsu with other elements like water, creating a new and powerful technique. This could lead to him being sought after by different clans for his knowledge.
Maybe Sasuke. Although they are rivals, they also have a deep bond. Sasuke might have come across a unique jutsu during his travels and decide to teach it to Naruto so that they can both become stronger and better protect their village.
In 'Naruto Shadow Possession Jutsu Fanfiction', a character's development can be linked to how they adapt the jutsu to their own fighting style. Let's say a character is not very physically strong but is very intelligent. They could develop a new way of using the Shadow Possession Jutsu that focuses on strategy rather than brute force. This would show their growth as a fighter. Also, characters can develop emotionally when they use the jutsu in difficult situations. For instance, if they have to use it to fight a friend who has been brainwashed, it can cause them to question their own beliefs about friendship and loyalty.
He could practice in secret locations where no one can see him. For example, in an abandoned cave or a hidden part of the forest. That way, no one will know about the new jutsu he's developing.
It could be a new form of Rasengan. Maybe Naruto discovers a way to combine different elements with the Rasengan more effectively, like adding lightning to it for a more powerful and faster attack.
I really like this fanfic. It often explores unique aspects of the Naruto universe that the original series might not have delved into deeply. For example, it could introduce new jutsu combinations or character developments that are quite refreshing. The way it continues from the first part usually means it builds on the existing plot and character relationships, which can be very engaging for fans who are already familiar with the initial story.