The main character is Xiao Yan. He is a determined and talented young man on his journey of growth and power - seeking in the story.
I'm not entirely sure as I haven't read the 'Principles of Heaven Light Novel' in detail. But typically in a light novel, there would be a protagonist who drives the story forward. There might also be a sidekick or a group of friends who support the main character in their adventures.
The protagonist is surely one of the main characters. He is the one driving the story forward with his quest for the heaven - defying sword. Then there's his mentor, who plays a crucial role in his early development and provides him with important knowledge and guidance.
Dio is surely one of the main characters as the title implies. There might also be characters like Jotaro Kujo who often has conflicts with Dio in the JoJo's universe. They could be involved in battles and power struggles in this light novel.
I'm not entirely sure as I haven't read it thoroughly, but there could be a powerful angel as one of the main characters.
I don't know for sure since I haven't read it. But it's likely to have strong female characters who are the divas, perhaps with unique personalities and abilities.
I'm not sure exactly as I haven't read it fully. But usually in such light novels, there is a central protagonist who drives the story forward.
I'm not sure exactly as I haven't read it fully, but they could be young gamers who are really good at this 5 - second battle game.
The protagonist is one of the main characters. But without having read it thoroughly, I can't name all of them specifically.
The main character is definitely Alita. She's a cyborg who wakes up with no memories. There are also likely other characters such as Hugo, who might be a friend or love interest of Alita. And then there are the villains in the story who oppose Alita and try to stop her from achieving her goals, though their specific identities would be more detailed in the actual light novel.
I don't know as I haven't read it. Maybe the title implies there is a character experiencing their first day in heaven, but without reading it, it's hard to say who the main characters are.