I don't know the specific 'gym king story', so I can't say for sure who the main characters are. It could be the 'gym king' himself and maybe his trainer or his rival at the gym.
The main characters are probably the boys who are in the gym. They could be boys from different backgrounds, with different goals for being in the gym. Some might be there to build muscle for sports, others could be there to lose weight or just to get fit. There might also be a trainer or an older boy who serves as a mentor figure among them.
The main characters in a 'gym lover visual novel' might include a determined athlete who is training for a big competition at the gym. There could also be a novice who is intimidated by the gym environment at first but is inspired by the other characters. Another possible main character could be a gym owner who has his own story and relationships with the gym - lovers that come to his place.
There are different characters in 'For the King'. You can have a warrior - type character who is strong in combat. There is also often a mage - like character who can use magic to fight enemies or solve puzzles.
The main characters are Lanora and Ash. Lanora, as a gym leader, has her own set of Pokémon and rules in the gym. Ash, on the other hand, is on his journey to become a Pokémon master. In this fanfiction, their paths cross and they interact, which forms the core of the story.
Since I don't know the exact'south king south king story', I can't say for sure who the main characters are. But as the name suggests, South King might be a main character.
The main characters are the king and the cobbler. The king represents the high - born, powerful figure in the society, while the cobbler is from the lower working class.
The main characters are the princess and King Thrushbeard. The princess is initially proud and haughty, while King Thrushbeard is a clever and patient king who disguises himself to teach the princess a lesson.
Since I don't know the exact'small king story', I can't say for sure. But likely the small king himself is a main character.
If it's about a competition, all the birds are sort of main characters. But if it's about a specific 'king' bird like an eagle, then the eagle is the main one. There might also be other animals or birds that interact with the 'king' in the story.
The main character is obviously the selfish king. There may also be his subjects, like the peasants, knights, or advisors who interact with him and are affected by his selfishness.