There's no way to tell exactly without more information. However, in a game story, the main characters are often those who drive the plot forward. So in the 'white enamel game story', they might be characters who have a special connection to the white enamel. Maybe a character is a craftsman who specializes in white enamel work, or a hero who is on a quest related to white enamel.
I'm not sure specifically what the 'white enamel game story' is about as it could be a very unique or less - known concept. It might be a story related to a game that involves white enamel as a key element, perhaps in the game's setting, like a white enameled object being important in the game's plot or it could be about characters in a game who are associated with white enamel in some way.
The main characters could be two rival players. One who always chooses the black side and is very strategic and cunning, and the other who prefers the white side and is more about fairness and calculated risks.
Without having read the 'White Day Game Story', it's just speculation. But it could have a young couple as the main characters. They might be in a new relationship and the White Day game could be a way for them to get to know each other better. There could also be side characters like their best friends who join in the game to add some fun and friendly competition. Another possibility is that there is a single protagonist who is looking for love on White Day and the game is a way for them to meet new people.
As I don't have detailed information about this 'white night game story', I can't say for sure who the main characters are.
I'm not certain about the specific main characters. It could be a group of investigators or just a lone adventurer.
It could be a group of friends. For example, there might be Tom, who is always the joker in the group and tries to make the game more fun with his wild gift choices. Then there's Mary, who is very practical and brings a useful but not so exciting gift. And there could also be Jack, the competitive one who is always aiming to get the most valuable gift.
Since I don't know the specific 'White Island Game story', I can't say for sure what the main characters are. But they could be adventurers, scientists, or just regular people who end up on the white island.
Obviously, the White Wolf is one of the main characters. He is often the center of the action, with his own goals and motives.
Since I don't know the specific 'the white king story', it's hard to say. But surely the white king is one of the main characters. There might also be his advisers, a queen, and perhaps some knights or villains.
In the 'White Christmas Story', one of the main characters could be an old man who has seen many white Christmases in his life and has a lot of stories to tell. There might be a group of carolers as well, spreading the Christmas cheer. Also, a postman could be a character, as he has to brave the snow to deliver Christmas cards and presents. These characters together could create a tapestry of a white Christmas story, each with their own role in making the story interesting and engaging.