I'm not sure specifically as I haven't read the 'red souls novel' in detail. But usually, the main character is someone who has a central role in driving the plot forward, perhaps a hero or an anti - hero.
I don't know the exact main characters without reading the novel. But usually, in a novel about souls, there could be a guide soul, like a wise old soul who helps other souls on their journey.
There's also the Fire Keeper. She plays a crucial part as she is associated with the bonfires and provides guidance to the Ashen One. And then there's the Soul of Cinder, which is a significant entity in the novel's plot. It represents the combined wills of all the Lords of Cinder who have failed in their duties to link the First Flame in the past.
I'm not entirely sure as I haven't read the novel in full, but typically in a novel about alchemy of souls, there would be an alchemist as a main character. Maybe a young apprentice who is just starting to learn about soul alchemy.
I'm not sure exactly, but there might be a brave hero or heroine.
I'm not entirely sure as I haven't read it in great detail, but I think there are two main characters, an older man and an older woman.
Not having read the 'library of souls graphic novel', it's hard to say for certain. However, it's common for there to be a character who is an outsider at first. This character then becomes the key to unlocking the mysteries of the library. There could also be some supporting characters, like other people from the world where the library exists, who either help or hinder the main character in their journey through the library of souls.
I'm not entirely sure, but it could feature characters like the Chosen Undead, who is on a journey through the difficult world. Maybe there are also some of the important non - playable characters from the game, like the Fire Keeper.
I'm not entirely sure as it depends on the specific version of the graphic novel, but often there's a protagonist who is an outsider drawn into the carnival.
There might also be a secondary character, like a shrewd businessman who takes advantage of those 'in the red'. He could be the antagonist, making the situation worse for the main characters by charging high interest rates or buying their properties at a low price.
I'm not sure exactly which passage you're referring to, but in the Dark Souls novel in general, characters like the Chosen Undead are often central. They are the ones on the arduous journey through the dark and dangerous world.