Well, Yhorm the Giant is likely a central figure. In addition, depending on where he crosses over to, it could be heroes or villains from that new world. For example, if he crosses into a world with a lot of magic - using heroes, those heroes might be main characters as they interact with Yhorm. Or if it's a crossover with a post - apocalyptic world, perhaps the leaders of the survivor groups could be main characters too, all depending on the creativity of the writer.
In 'yhorm the giant crossover fanfiction', Yhorm the Giant is a main character for sure. Other possible main characters could be those who are directly involved in his crossover journey. It might be a guide or a foe that he meets right at the start of his crossover. There could also be characters who have a special connection to the new world's power source or some kind of ancient prophecy, and they would then become important in the story as they interact with Yhorm.
Since it's a crossover fanfiction, Yhorm the Giant is surely one of the main characters. But it's hard to say who else without reading it. It could be characters from the original world of Yhorm and characters from the world he crosses into.
A 'yhorm the giant crossover fanfiction' might be a creative take on the character Yhorm. It could involve him crossing over into a different game's lore or a fan - created universe. The author might be exploring what would happen if Yhorm, with his own set of abilities and characteristics, had to deal with the rules and characters of this new place. It could be an exciting exploration of combining different fictional elements.
In addition to the fox, there could be a human character who stumbles upon the fox's world. This human could either be a friend or a foe to the fox. They might try to study the fox or, on the other hand, try to protect it from other threats in the fanfiction's universe.
I don't know who the main characters are in the 'giant story' because you haven't provided any details about it. It could be a hero who has to face the challenges presented by a giant, or it could be the giant itself as the central figure in the story.
I don't know the exact main characters in the 'ghost giant story' since I don't know the specific story. But it could be a brave hero who tries to face the ghost giant, or a group of villagers who are affected by the ghost giant's presence.
The boy is one of the main characters. He befriends the Iron Giant and helps him in many ways.
Maybe there are some small creatures that play important roles too. They could be the friends or foes of the giants. In some stories, these small characters can have a big impact on the giants' lives.
Since we don't know the exact 'giant man story', it could be just the giant man himself as the main character.
The main character is surely the friendly giant. There might also be some villagers or children who interact with the giant.
Obviously, the giant woman is a main character. There might also be some normal - sized people in the story, like the villagers who interact with her. They could be either friendly or afraid of her.
The main characters are usually Elsa from 'Frozen' and Jack Frost from 'Rise of the Guardians'.