I would say Rock Lee. His unique fighting style based on pure hard work and his ability to open the Gates make for some really exciting battle royale moments. And then there's Kakashi. His vast knowledge of jutsu and his Sharingan could give him an edge in a battle royale. Also, his laid - back but strategic personality adds depth to his character in fanfiction.
Harry Potter himself is often a popular choice. He has the skills, the experience, and the hero - like qualities that make him a strong contender in a battle royale. Hermione Granger is also popular as her vast knowledge of magic can give her an edge. Then there's Draco Malfoy. His Slytherin cunning and his family's resources can make for an interesting character in this kind of cut - throat scenario. And Voldemort, if included, is a major force to be reckoned with.
Naruto himself is always interesting. In fanfiction, he might have different personality traits or powers that make him even more engaging. His determination and never - give - up attitude always shine through.
Naruto himself is always an interesting character to write about in this context. His positive attitude and never - give - up spirit can bring a lot of changes to Esdeath's peerage. Esdeath is also very interesting. Her cold - blooded and yet somewhat alluring personality can create a lot of drama and tension when paired with Naruto.
Well, one of the most interesting characters to write about in grey smart Naruto fanfiction is Gaara. He has his own complex past and his understanding of the world could be different from Naruto's in this new scenario. Their interactions could be full of tension and growth. Konan could also be an interesting character. Her skills and her connection to the Akatsuki could be explored in relation to a grey smart Naruto. And Pain. His ideology could clash or align in unexpected ways with Naruto's new approach, creating a lot of potential for a thought - provoking story.
Among the characters in Bella and the Originals fanfiction, Marcel is quite interesting. He has his own power and his relationship with the Originals is complex. When you bring Bella into the equation, it can create new power struggles or alliances. Bella, of course, is central. Her own journey of self - discovery and her relationships with the Originals can be explored in depth. And let's not forget Hayley. Her connection to the werewolves and her role in the Originals' story can lead to some really engaging storylines when paired with Bella.
In Halo, Master Chief is always an interesting character to write about. His stoic nature and badass combat skills provide a lot of material. In RWBY, Ruby Rose is a popular choice. Her innocence combined with her powerful scythe - wielding skills make for great storylines. When it comes to crossovers, seeing how Master Chief would react to Ruby's enthusiasm and naivete would be fascinating.
Since I haven't read the exact 'battle royale the novel' in question, it's hard to name the main characters precisely. However, in this type of story, there are often characters who take on leadership roles within the group of participants, or those who have some sort of special backstory that makes them important to the overall plot.
Circe is a very interesting character for greek fanfiction. She has the power of magic and transformation. Writers can explore how she uses her powers to manipulate those who come to her island. Also, Odysseus is a classic character that is always interesting to write about in new ways. His long journey home can be reimagined, or his interactions with other mythological beings can be expanded upon.
Gerry is definitely one of the most interesting. His unique love for animals and his innocent yet inquisitive nature offer a lot of room for creativity. Writers can create all kinds of scenarios where Gerry discovers new species or has heart - warming interactions with the local wildlife.
Alice is a very interesting character to write about. Her ability to see the future gives so many possibilities for plot twists. Writers can explore how she might use or be haunted by her visions in different situations. Another is Jasper. His past as a Confederate soldier and his struggle with his bloodlust can be delved into deeply.