Typically, the main character is the shadow walker themselves. They often have unique abilities related to shadows. There might also be Naruto and his friends like Sasuke and Sakura, who interact with the shadow walker in different ways, either as allies or sometimes as rivals.
One interesting plotline could be the development of unique shadow - based jutsus. For example, the main character might discover a way to merge different shadow techniques to create an ultimate shadow defense. Another could be the exploration of the relationship between the shadow walker and the Akatsuki. Maybe they try to recruit the shadow walker for their own purposes.
The Spirit Realm Walker Shadow Combination referred to Master Wu Hen. Master Wu Hen was a comrade of Zhang Yuanqing's father. He played the role of the Shadow Twins in the novel " Spirit Walker."
Maybe it's an old wizard who has been in hiding as a Shadow Walker for years. He comes out of hiding to help Harry Potter in his fight against the dark forces. So he would be the main character, with his past experiences and powers adding a new dimension to the story.
Perhaps the Shadow Walker is a new character who has a connection to an ancient magic that Voldemort is also seeking. In the fanfiction, this could lead to a race between Harry and Voldemort to gain the power of this magic with the help of the Shadow Walker.
Jack Walker in this fanfiction is likely the main character. He's someone who has his own story within the Pokemon - themed world. Maybe he's a unique trainer with special abilities or a backstory that sets him apart from other trainers in the fan - made story.
A really cool plot could be where the Shadow Shadow Fruit user teams up with Kakashi. Kakashi is known for his intelligence and combat skills. Together, they could come up with unique strategies using the Shadow Shadow Fruit. For instance, they could use the fruit's power to create illusions within the shadows, confusing their enemies. The fanfiction could then explore how they face different threats in the Naruto world while developing their bond.
Well, in some fanfictions, Naruto might learn the shadow travel ability through a special training with a hidden shinobi. Maybe this shinobi has a unique jutsu related to shadows and decides to teach Naruto as he sees Naruto's potential.
One possible interpretation could be that in this fanfiction, the use of the shadow clone technique by Naruto takes on a unique or interesting 'lemon' - like aspect. Maybe it involves some comical or creative scenarios where the clones cause chaos in a humorous way. For example, the clones could accidentally create a lot of mess while trying to help Naruto in a daily task, like cooking, and it turns into a lemon - like zany situation.