Well, it really depends on the specific fanfiction. There are countless Naruto fanfictions out there, and while some might include Naruto singing 'This is Halloween' for the sake of a unique or crossover plot, others may not touch on this idea at all. It could be part of a Halloween - themed fanfiction where Naruto is placed in a spooky situation and the song fits the mood.
There's also 'Halloween in Konoha'. This fanfiction focuses on how the whole village of Konoha celebrates Halloween. It shows different characters like Sakura and Sasuke getting into the spirit of the holiday in their own ways. There are costume contests, spooky stories being told around the village, and Naruto, of course, getting into all sorts of mischief.
The main characters would be Naruto and his friends from the Leaf Village. But in Halloween Town, we could see some characters inspired by classic Halloween figures. There could be a Jack - o' - lantern - headed merchant who sells strange items. A mummy - like ninja who is very slow but has incredible strength. And a ghostly figure who was once a great ninja but got trapped in Halloween Town and now gives Naruto advice on how to defeat the forces that lurk in the shadows of the town.
A possible plot for a 'Naruto Halloween Town' fanfiction is that it's Halloween in the ninja world and Naruto accidentally opens a portal to a parallel Halloween Town. Once there, he discovers that the town is in danger from an ancient evil that was sealed away long ago but has now been awakened. Naruto, with his never - give - up attitude, tries to rally the residents of the town, who have their own unique powers related to Halloween, like flying broomsticks and shape - shifting into bats, to fight against this evil.
One popular theme is the transformation of characters into Halloween - like creatures. For example, Naruto might turn into a were - fox due to some spooky magic on Halloween. It adds a fun and unique twist to the characters we know.
Use dark and descriptive language. For example, 'The moon hung low in the sky, casting long, eerie shadows across the village. The wind howled like a banshee through the narrow alleyways.' Also, introduce spooky elements like ghosts or demons that lurk in the corners.
Well, a great Naruto Halloween fanfic could involve the Hidden Leaf Village hosting a huge Halloween party. Naruto dresses up as the Hokage he wants to be in the future. But then, some strange masked ninjas show up and start causing trouble. Naruto and his friends then have to figure out who they are and stop them while still enjoying the party spirit.
You can add spooky settings like a haunted forest near the Hidden Leaf Village. Also, create new jutsus with a Halloween theme, for example, a jutsu that summons ghosts. Characters can dress up in Halloween costumes, like Naruto dressing as a demon fox for fun. And there could be special Halloween - only events in the village, such as a pumpkin - carving competition.
Kaguya could be a great main villain for this. Imagine Kaguya emerging on Halloween night, her already otherworldly appearance made even more menacing with spooky Halloween - like enhancements. She could use the energy of the night to her advantage, trying to plunge the world into eternal darkness, and Naruto and his friends have to stop her.