It's hard to say without reading the fanfic specifically, but it could be characters who are part of the Capitol elite. Maybe a game - maker who has a different view on the Hunger Games than others in the Capitol.
It could be some of the Capitol citizens who were minor characters in the original Hunger Games. For instance, Effie Trinket could be a main character, and we might see her life in the Capitol outside of her role as a escort for the tributes. There could also be new characters created specifically for the fanfiction, like a young Capitolite who starts to question the Hunger Games.
Another aspect might be the different relationships between characters. Maybe the fanfic focuses on relationships that were only hinted at in the original, like friendships or rivalries within the Capitol. It could show how these relationships play out in the context of the Hunger Games.
Obviously, 'Merome' which is likely a combination or reference to two main characters. But without reading the specific fanfic, it's hard to say exactly who they are. They could be original characters created for the fanfic within the Hunger Games universe.
I'm not sure specifically as it depends on the fanfic. But it could be a new set of tributes from different districts. Maybe a strong - willed girl from District 4 and a smart boy from District 11.
Most likely, the main characters would be the well - known members of Magcon. They could be Nash Grier, Cameron Dallas, etc.
I'm not sure specifically as I haven't read this fanfic. But it could be new tributes created by the fanfic author.
A young, brave pilot from a small, rebel - affiliated starship could be a main character. He's got great flying skills and uses them to his advantage in the arena. For instance, if there are flying obstacles or challenges, he can navigate through them easily.
Since I don't know the exact fanfic, it could feature well - known victors like Katniss Everdeen and Peeta Mellark. They are central characters in the Hunger Games series and are likely to be important in a fanfic about victors.
Obviously Naruto himself could be a main character. He has the skills and the charisma. Sasuke could also be a main character. His brooding nature and powerful ninja abilities would make him a force to be reckoned with in the Hunger Games arena. Sakura, with her medical ninjutsu and growing combat skills, could also be a key character.
There might be a secondary character who is a mentor - like figure. They could have been a previous Hunger Games winner and now they are guiding the main character with their knowledge and experience. They might offer advice on strategies for survival, like how to make the best use of the resources in the arena.