There could be a loyal general. For example, in some stories, this general helps the emperor in battles and political maneuvers. They have a deep bond of trust and respect. The general is often highly skilled in warfare and has a strong sense of loyalty towards the emperor.
Since it's called 'emperor's domination', the emperor must be a central figure. There might also be his advisors or generals. Maybe there are some characters who oppose his rule, like rebel leaders or ambitious nobles that could also be important characters in the story.
In 'The Villainess Reverses the Hourglass', the main character is Aria. She was a villainess but gets a chance to change things. In 'I'm the Villainess, So I'm Taming the Final Boss', the female lead is the villainess who has to deal with the final boss. Often, the main characters in these novels are villainesses who are trying to rewrite their fates, either by changing their personalities or their actions in the story.
In many 'gor light novel', there's often a brave hero as the main character. For example, in 'Gor: The Warrior's Path', the main character is a young man named Kael. He is on a journey to become the greatest warrior in the land.
The main character, the archmage, is typically depicted as a solitary figure at first. But as the story progresses, he gathers around him a group of diverse characters. There could be a street - smart thief who has a heart of gold and provides a different perspective on the world. There may also be an old wizard who acts as a mentor to the archmage, guiding him with ancient wisdom. And of course, there are often characters from different races, like an elf with natural magic affinity or a dwarf with a deep understanding of magical artifacts, all of which add depth and variety to the story.
I don't know the specific main characters in the 'abyss domination novel'. However, they could be adventurers who are drawn to the abyss for various reasons like seeking power or knowledge, or they might be native creatures of the abyss with extraordinary abilities who play a significant role in the story.
Typically, the main character is the emperor himself. He could be a young and inexperienced one at the start, like in 'The Novice Emperor's Journey' where the emperor has to learn how to rule while facing various threats.
I'm not entirely sure as I haven't read it in detail. But generally, it might involve the story of an emperor, his rise to power, political intrigue, and battles perhaps.
It could be a powerful Pokemon like Mewtwo. Mewtwo has the strength and intelligence to potentially be a dominant force in such a fanfic.
In a 'hacker light novel', you'll often find the lone - wolf hacker. This type of character is independent, relying on their own skills and knowledge. They might be a bit of an outcast in society because of their unique abilities. There could also be the mentor - like character, an older and more experienced hacker who guides the younger ones. Additionally, there are the victims of hacking, such as ordinary people or big corporations whose data or systems are targeted by the hackers in the story.
The emperor himself, of course. He is usually the central figure, making important decisions regarding the empire. He is often portrayed as powerful, intelligent, but also with his own flaws and challenges.