Naruto is the central figure. Alongside him, we could see Aizen, the mastermind from the Bleach series. Aizen might be an antagonist or an unexpected ally. There would also be various Hollows and Arrancars. The Espada, for example, would be important characters. They would interact with Naruto in different ways, some might oppose him, while others might be intrigued by his unique abilities and his different way of thinking.
Since it's Naruto - themed in the Hueco Mundo, Naruto would likely be one of the main characters. There may also be characters from the Hueco Mundo like Aizen or some of the Arrancars.
Well, it could be about Naruto somehow finding himself in Hueco Mundo and rising to be its king. Maybe he uses his ninja skills to gain the respect of the Arrancars there.
The 'naruto god of hueco mundo fanfiction' could be a creative take on combining two very different fictional universes. Naruto, with his known growth and abilities in his own series, being a 'god' in Hueco Mundo could mean he has to face new challenges. For example, dealing with the Espada, who are powerful beings in Hueco Mundo. He might use his Sage Mode or other techniques in unexpected ways to assert his god - like status and make an impact on the world of Hueco Mundo.
Obviously Naruto would be the main character. There could also be the forest spirits which could be original characters created for this fanfiction. Maybe some of Naruto's friends like Sasuke or Sakura might make an appearance, either to help Naruto in his forest - related challenges or to try and bring him back to the village if they think he's spending too much time in the forest.
Obviously Naruto himself. And Sasuke could be there too, either as an ally or a rival. Sakura might also play a role, perhaps as a healer in Naruto's journey to become the 'king of kings'.
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.
In this fanfiction, characters like Hagrid could also be involved. He could befriend Naruto and introduce him to the more positive aspects of the wizarding world. And of course, there could be other Death Eaters who might either try to use Naruto or see him as a threat due to his relation to Bellatrix.
Well, Naruto is the key character here. Then we could have other Naruto characters like Jiraiya. In the Olympian part, Hermes could be a character as he could be the one to guide Naruto in the Olympian world. Also, Aphrodite might be there, perhaps using her charm powers to either help or hinder Naruto. And in the Naruto world, we can't forget characters like Gaara who might react in different ways to Naruto's newfound Olympian identity.
One potential character could be Kakashi. He would probably be very confused and concerned about Naruto's situation. He might try to train Naruto to control his powers in a way that doesn't harm himself or others. Another character could be Tsunade. As the Hokage, she would have to decide how to deal with Naruto. She could either support him or try to keep him in check. And of course, there could be some villains from the Deathwing side who come to either recruit or destroy Naruto.
Obviously Naruto would be the main character. Shukaku itself or a representation of Shukaku's spirit could be there. Also, characters like Iruka sensei would still be around. His friends like Sasuke and Sakura would play important roles as they react to Naruto's new situation.