I don't know for sure, but there could be a child who owns the big blue balloon.
There might be a character who gives the big blue balloon as a gift. And of course, the big blue balloon itself can be considered a character in a way. There could also be other characters like the people or animals that the balloon encounters during its journey.
Since we don't really know the details of the 'big blue balloon story', the characters could be diverse. It could have a little girl as the main character who loves the big blue balloon. There might be a mean boy who tries to pop the balloon. And there could be some friendly birds that the balloon befriends while floating in the sky. It all depends on how the story is written.
I'm not sure specifically as there could be many different 'big blue balloon stories'. It might be about a big blue balloon's adventure, like floating in the sky and seeing different things from above.
As I don't know the exact 'big red balloon story', it could be a child as the main character. Since balloons are often associated with children, a kid might be the one who owns the big red balloon.
Since I don't know the exact 'big blue bill story', I can't say for sure who the characters are. But if Bill is in the title, he might be a main character. There could also be other characters related to this 'big blue bill' situation, like friends or foes of Bill.
In the 'big blue truck story', the main character is obviously the big blue truck itself. But there could be other characters too. For example, there could be a group of kids who are always excited to see the big blue truck pass by their neighborhood. Or there could be a villain - like character, like a bully truck that always tries to push the big blue truck around on the road. And of course, there could be roadside assistance workers who come to help the big blue truck when it breaks down.
There is the balloon man for sure. And usually there are children who are interested in his balloons.
There could be a variety of main characters in the 'big blue train story'. It might be a young adventurer who boards the big blue train to explore new places. Or perhaps an old, wise railway worker who has been taking care of the train for years. Also, there could be a group of friends traveling together on the train, and they all play important roles in the story.
The main characters in the 'big blue ox story' are the big blue ox, usually named Babe, and Paul Bunyan. Paul Bunyan was a larger - than - life logger, and his big blue ox was his trusty sidekick.
The bear is the primary character in this story. Additionally, there may be characters like a wise old owl who gives advice to the bear. There could be a group of friendly chipmunks that often play with the bear in the yard of the big blue house. And perhaps there's a kind - hearted raccoon that sometimes comes over to share a meal with the bear in the big blue house. There might also be other unnamed animals that are part of the bear's community in and around the big blue house.
I don't know for sure since I don't have much information about this 'the big blue true story'. It could be some oceanographers if it's related to the ocean.
If it's related to the movie, the main characters are Jacques and Enzo. They are central to the story as they are the ones competing in free - diving.