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.
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.
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.
Some fans might also like the mentors in the 77th Hunger Games fanfiction. They are the ones with the experience of past games, and they use their knowledge and wits to guide their tributes. Their complex personalities, as they balance their loyalty to the Capitol and their care for the tributes, can be really interesting to explore.
Katniss is still a very popular character in fanfiction. Her strong and complex personality gives a lot of room for different interpretations and new storylines.
A plot could involve a love story within the Hunger Games. Maybe a tribute falls in love with someone from another district during the training period. This love gives them extra motivation to survive and protect the other person. They could try to find ways to both survive the games, which is against the rules, adding a lot of drama.
One idea could be to focus on a new type of arena. For example, an arena that is constantly changing between different biomes like a desert one moment and a frozen tundra the next. This would add a whole new level of challenge for the tributes.
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.
I don't know who wrote it. There are many Hunger Games fans out there who could have created this fanfiction.
One idea could be to focus on a character who has been secretly trained for years in a unique combat style and uses it to their advantage in the Games. For example, a character who has mastered the art of using a slingshot with deadly accuracy, taking out opponents from afar.
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.