It might be a single brave child along with his or her little pet bird. The child is adventurous and the bird acts as a guide in the sky, showing the child all the amazing things in the sky walk. And there could also be some friendly sky fairies that they meet during the journey.
Maybe the children find a magic ladder that leads them to the sky. There, they meet talking clouds and flying animals, and they have a great adventure exploring the sky world.
The main characters are the Sky Children themselves. They are the ones who drive the story forward by exploring and spreading light.
The main characters are the Sky Children of the Light themselves. They are the spirits that drive the story forward as they embark on their journey.
The main character is the chicken. It is the one that first believes the sky is falling and starts to run around spreading the news.
The main characters are Rosie, the hen, and the fox.
One possible main character in 'at war with nature fanfiction' could be a shaman. They have a deep spiritual connection to nature but are now called upon to use their powers in a different way to fight the raging nature. A journalist who is documenting the events of the war with nature could also be a main character. Through their eyes, we can see the horror and the hope of the situation. And an inventor who creates unique gadgets to help humanity in this war against nature, whether it's for defense or for finding a way to make peace with nature again.
Since I don't know the details of 'the walk original story', I can't say for sure who the main characters are.
The main characters could be a group of friends like Tom, Jerry, and Lucy. They are all different ages and personalities but love going to the beach together.
The main characters in the 'Children of the Sky' short story might be a group of siblings who are born with a special connection to the sky. They could have different personalities. One might be brave and always eager to explore the higher reaches of the sky, while another could be more cautious and focused on protecting their home in the sky. There could also be a mentor figure, an older 'child of the sky' who guides the younger ones.
The most prominent character is the man with the ability to walk through walls. However, there might be other characters as well. For instance, if the story is set in a town, there could be neighbors who are curious about him or perhaps even afraid of him. There could also be a love interest who either accepts or is repelled by his strange power. These characters would play important roles in developing the story around the main character.