Perhaps an older brother who volunteers to take his younger sister's place in the 50th Hunger Games. He has a strong sense of family loyalty and his journey in the Games could be about protecting the other tributes who remind him of his sister.
There could be a boy from District 4 who is an expert fisherman. He uses his knowledge of water and fishing to survive in the arena. He might form an alliance with the girl from District 12, and together they face the challenges of the 50th Hunger Games. He is also very clever and can outwit other tributes.
There could be a mentor character who was a previous Hunger Games winner and is now guiding the new tributes. This character might have their own secrets and motives, and their backstory and how they interact with the tributes can make them a popular and complex character in the fanfiction.
It could be a young girl from a poor district who has been training in secret for years. She has a strong will to survive and a deep - seated desire to expose the Capitol's cruelty. Her journey through the Games could be about not just survival but also sparking a revolution among the tributes.
A girl from District 11 who is an expert at climbing trees could be a great main character. She could use her skills to hide from other tributes and also find food sources in the arena.
A previous victor forced to return to the Games for the 50th edition could be a great main character. Their experience from the past would give them an edge, but also a lot of emotional baggage. It would be interesting to see how they handle the new challenges and younger opponents.
A young girl from District 12 who has been secretly training in combat skills her whole life. She could be the main character, using her wits and skills to survive the games.
There could be a disabled tribute from an unknown district. Despite his physical limitations, he has a brilliant mind and uses his strategic skills to form alliances and stay alive in the 73rd Hunger Games.
It could be about a new set of tributes. Maybe there's a tribute from an unexpected district who has a unique skill, like being able to communicate with animals. This skill gives them an edge in the arena, leading to all kinds of new alliances and betrayals.
The main character could be a new tribute who has some unique skills or abilities. For instance, a tribute who is an excellent tracker but also has a kind heart. Or it could be one of the minor characters from the original 4th book who gets a chance to shine in the fanfiction, like a young Capitol citizen who starts to question the Hunger Games system after seeing the events of the 4th games.
A girl from District 12 could be a great main character. She could be different from Katniss, maybe she's more of a strategist than a hunter. She uses her wits to form alliances and outsmart her opponents in the arena.