An old doll - maker who has a secret past related to the creation of Annabelle. Maybe he made a mistake during the doll - making process that led to her becoming haunted, and now he feels responsible and tries to fix things in the fanfiction.
The Warrens could be great characters to include. Their knowledge of the occult and their experience with haunted objects like Annabelle can add a lot of depth to the story. They can be the ones trying to either save Annabelle or stop her from causing more harm.
Ace is a great character to include. He was Whitebeard's adopted son, and their relationship was very deep. Stories about their interactions, whether it was Ace learning from Whitebeard or them having father - son moments, are always interesting. Marco is also a good choice. As Whitebeard's right - hand man, he could be in stories that show the inner workings of Whitebeard's crew and how they strategize and operate. Another one could be Luffy. Since Luffy had a connection with Ace and later respected Whitebeard, a fanfiction could explore their interactions.
Obviously, Bahubali himself is a must - include. His strength, courage, and leadership make him a central figure. Then there's Kattappa. His loyalty and his complex relationship with Bahubali can add a lot of depth to the story. Also, Devasena is an important character. Her love for Bahubali and her own strength as a princess can bring in elements of romance and female empowerment in the fanfiction.
Obviously Chowder himself is a must - include. Mung Daal, as his mentor, also makes for great content. And Truffles, with her strict but caring nature, can add interesting dynamics to the story.
For a more unique take, including Jiraiya could be great. His pervy but knowledgeable personality could lead to some humorous and yet useful moments. He might have some ancient knowledge about the connection between the Naruto world and the Pokémon world where Darkrai comes from. On the Pokémon side, Cynthia could be a great addition. As one of the strongest Pokémon trainers, she could offer a different perspective on Darkrai and also help in battles against any enemies that might be using Darkrai's power for evil.
Obviously, the clone troopers themselves are essential. Characters like Rex, Cody, and Fives are very popular. Jedi generals like Anakin Skywalker and Obi - Wan Kenobi also make great additions as they often lead the clone troopers into battle. Then there are the villains. General Grievous can be a great antagonist in a Clone Trooper fanfiction as he is a fearsome enemy who the clones often face.
Alfred should be included. He can provide Batman with support and advice, and his unique perspective on things could add an interesting element when Supergirl is around. He might even offer her some tea and wise words.
Haku should definitely be included. Since Haku was Zabuza's loyal follower, his presence can add depth to the story. He could act as a mediator between Naruto and Zabuza at times. Also, Kakashi can be a great addition. His history with Zabuza makes for an interesting dynamic, and his mentoring of Naruto can play a role in how Naruto interacts with Zabuza.
Definitely Sirius Black. Since he was one of Lupin's best friends and also had a strong connection with Harry. His presence can add a lot of drama and backstory to the fanfiction.
Well, in addition to Naruto and Urahara, Ichigo from Bleach could be a great addition. Since Urahara has a connection with Ichigo, and Naruto's energetic and positive nature could create an interesting dynamic with Ichigo's more brooding personality.
A new character, a kind - hearted artist in the town, could be a great addition. This character could be the first to truly understand Edward's artistry with his scissorhands. They could collaborate on a project that changes the way the town views Edward, bringing more acceptance and new opportunities for him.