I don't know the specific characters in this novel as I haven't read it. It could be a young adventurer who is the key to the connection between the worlds.
I'm not sure specifically as I haven't read the novel, but usually in a story about two worlds, there could be a protagonist who is a bridge between the two. Maybe a character who was born in one world but has to enter the other for some reason.
Not having read the novel, we can only guess. But the main characters could be individuals who represent different 'worlds' in the story. They might be the ones who face the challenges and opportunities that come with the existence of these 'worlds between us'. Maybe there is a character who is trying to unite these different 'worlds' or one who is causing more division between them.
Naruto is the main character without a doubt. Besides him, characters like Hinata could be important. Hinata has deep feelings for Naruto, and if Naruto is in a strange state of being between two worlds, Hinata might play a role in bringing him back or helping him through it. Also, Pain could be a significant character if the two worlds are related to the different ideologies that Pain and Naruto represent, such as Pain's view of a world in pain and Naruto's view of a world at peace.
One of the main characters is the unnamed narrator. He witnesses the Martian invasion first - hand and tells the story. There are also the Martians themselves, who are the antagonists. They are the ones causing all the chaos and destruction on Earth.
I'm not sure as I haven't read the 'floating worlds novel' specifically. But typically, in a novel like this, there could be an adventurous protagonist who is eager to explore the floating worlds.
I don't know for sure, as I haven't read it. But usually there are brave heroes or heroines in this kind of graphic novel.
As I don't know the exact 'walker of worlds novel', it's hard to say. But it's likely that the main character is the 'walker of worlds' themselves. There might also be side characters like a guide in one of the worlds they visit, or an enemy who tries to stop them from traveling between worlds.
In 'As Worlds Collide Novel', there could be a scientist as one of the main characters. Scientists are often involved in stories like this as they try to understand the phenomenon of the colliding worlds. There might also be a leader from one of the worlds, someone who has to make difficult decisions to protect their people during this cataclysmic event. And perhaps a wanderer, someone who has no real home in either world and is trying to find a place in the new reality.
The narrator is a key character. He is an ordinary man who is suddenly thrust into this extraordinary situation of a Martian invasion. There are also some unnamed people that he encounters during the invasion. And the Martians, with their tripods and heat - rays, are the main antagonists. They drive the whole plot forward with their actions of attacking and trying to conquer Earth.
The main character is the narrator. He experiences the Martian invasion up close. His brother is another important figure. We follow their separate but related stories during this time of chaos. Additionally, there are various minor characters such as the soldiers. They represent the human attempts to resist the Martians. The interactions between these characters, especially the narrator's observations and his relationship with his brother, form the core of the story as we see how different people respond to this extreme situation of an alien invasion.