The giant is definitely a main character. The other could be a human, if it's a story about a giant falling in love with a human. Or it could be another giant or a magical creature from the same world as the giant. It depends on the nature of the story.
Well, it could be a story that explores the concept of an unlikely being, a giant, falling in love. It might involve the challenges he faces due to his size in the context of a relationship. For example, he could be feared by others, but still manages to find someone who sees beyond his exterior and they develop a deep emotional connection.
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.
Obviously, the tyrant is one of the main characters. And then there must be the person that the tyrant falls in love with. There might also be some advisors or servants around the tyrant who play important roles in the story, either helping or hindering the relationship.
I don't know as I haven't read it. But there must be a yakuza as one of the main characters, and probably the person he falls in love with.
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.
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 in the 'monster falls story' are really hard to determine without more information. However, it's likely that there are some unique monsters. For example, a monster with special powers like the ability to fly or control the elements. There could also be a group of misfit monsters who come together to face whatever challenges are in the 'monster falls' area. Their different personalities and abilities would then drive the story forward.
The main characters are Aphrodite, the beautiful and powerful goddess, and Percy. Percy is a key figure in the demigod world, and when Aphrodite falls in love with him, their interactions become the focus. There may also be other characters like Percy's friends who might react to this strange relationship or other gods who have opinions on Aphrodite's newfound love.