As we don't know the specific 'greastest sword immortal novel', it's impossible to name the main characters. However, in a typical sword immortal novel, there might be a young and talented protagonist, a wise and powerful master, and some antagonists who are either jealous rivals or representatives of evil forces.
Since we lack information about this 'greastest sword immortal novel', we can only guess. There could be a protagonist who is a gifted sword immortal - to - be. Maybe there's an old hermit who serves as a guide on his journey. And there might be a group of antagonists, perhaps from a rival sect, who try to stop the protagonist from achieving his or her goals.
I'm not sure which specific 'greastest sword immortal novel' you are referring to. There are many novels with sword immortals in different literary traditions. Generally, they might be about the adventures, cultivation, and battles of sword - wielding immortals, their pursuit of immortality, and their place in the immortal or martial arts world.
The main character is the first immortal of the sword. In addition, there are various characters from different factions. Some are from the good - aligned factions who may help the main character at times. Others are from the more sinister factions who try to stop his progress. Each character has their own motives and backstories, which all contribute to the complex tapestry of the story.
Since I don't know the exact 'dominating sword immortal novel', I can't say for sure. But usually, there would be the sword immortal as the main character. Maybe there would also be a mentor figure who taught the sword immortal his skills.
Since I'm not familiar with this exact novel, in a typical 'genius sword immortal' story, there would likely be a young and talented protagonist who is the genius with the sword. There might also be a wise old mentor figure who guides the protagonist on their journey. And of course, there would be antagonists, perhaps other sword wielders who are jealous of the protagonist's talent or those with evil intentions in the world of immortals.
In this novel, the main character is surely a key figure. He or she is probably a determined and brave individual with a strong will to master the immortal sword. Besides, there may be characters from different races or clans. For instance, there could be an elf - like character who has a deep connection with nature and can provide unique help to the protagonist. Or there could be a reclusive hermit who has some crucial information about the sword but is very difficult to find and persuade to share the knowledge.
I don't really know since I haven't read it. But usually, there would be a protagonist who wields the immortal sword. There might also be a mentor - like figure who guides the protagonist in the reverse world.
The titular Sword Immortal Son of Heaven is of course one of the main characters. He is the central figure around which most of the story revolves.
I'm not sure specifically as I haven't read this exact novel in detail. But usually in such novels, there might be a heroic protagonist with extraordinary abilities, perhaps a swordsman with unique skills and a strong sense of justice.
Perhaps there is a villain who is also after the power of the sword. And there might be a wise mentor figure who guides the main character in understanding the true power of the sword. There could also be other supporting characters like friends or family members of the protagonist.
I'm not sure as I haven't read this specific novel. But usually in sword - related novels, the main character could be a young and talented swordsman with a mysterious origin.