Since I haven't read 'mortal of the doom light novel' in detail, it's hard to name the exact main characters. However, in most light novels, there is a character with a special ability or destiny. This character is usually at the heart of the story, and there are other characters that surround them, some might be allies, some might be antagonists, all of which together drive the story forward.
I'm not sure about all the main characters specifically. But often in such novels, there is a central protagonist who is likely to be the one facing the challenges of the doom world. There may also be some side characters who play important roles in the protagonist's journey, like a mentor or a friend.
I don't know specifically since I haven't read it. But it could have a heroic protagonist who is the doom breaker. There might also be a sidekick or mentor character to help the main character on their journey.
Since I'm not familiar with the 'Mortals of the Doom Light Novel', we can only speculate. There could be a main character who is a fighter, always on the front line against the elements of doom. There might be a healer type character as well, someone who tries to mend the wounds of the mortals both physically and emotionally. And perhaps there is a character with a mysterious past that holds the key to either the cause of the doom or the solution to it.
Since I don't know the specific 'mortal immortal light novel', I can't say for sure. But it could be a protagonist who is in the process of becoming or is already an immortal while still having mortal qualities.
The main character in 'Sword of Doom novel' is Ryunosuke. He is a complex figure driven by his own dark desires.
I'm not entirely sure who all the main characters are specifically. But there's usually a character who is the wielder or seeker of the sword of doom.
I don't know as I haven't read the 'doom breaker novel'. It could be a lone hero or a group of diverse individuals.
There could be characters like Reed Richards. He is often in conflict with Doctor Doom. Richards represents the scientific and heroic side, which contrasts with Doom's more megalomaniac tendencies.
I don't know the exact main characters as I haven't read it. But they could be survivors in a doomed world, like a tough - as - nails warrior, a clever scientist, or a street - smart kid.
I don't know who the main characters in the 'doom town graphic novel' are since I haven't had the chance to read it.
The most obvious main character is Dr Doom himself. He is a central figure, driving much of the action and conflict in the story.