I don't know for sure, but it could be the mother herself, her children, and perhaps some of the well - known Naruto characters like Naruto, Sasuke, or Sakura who might be involved in the story related to the mother's sins.
Well, in a 'sins of the mother naruto fanfic', it could be that the mother has committed some sort of sin like betraying the village in the past. This could lead to her children facing discrimination or having to deal with the consequences of her actions. For example, they might have to prove their loyalty more than others, or they could be targeted by those who hold grudges against their mother. Maybe the story is about how they overcome these challenges and find their own place in the Naruto world.
I don't know for sure as I haven't read it. But it could be the mother, of course, and the 'knight' character. There might also be other Naruto characters like Naruto himself, Sasuke, or Sakura if the story is set in the main Naruto timeline and intersects with the main characters' storylines.
In 'naruto god of sins fanfiction', Naruto is the central figure as the 'god of sins'. But other characters like Kakashi could play important roles. He might be the one trying to guide Naruto or figure out what has happened to him. Then there could be new characters introduced specifically for this fanfiction, characters that represent different aspects of sins and are in conflict with Naruto. For instance, a character who embodies greed and is constantly trying to take Naruto's power or use it for their own evil purposes.
In addition to Naruto and Sasuke, characters like Sakura could also be a main focus. She might be associated with envy, perhaps envying the power or attention that other characters get. Kakashi could also play an important role, maybe representing pride in his skills and knowledge. And villains from the Naruto series could be even more emphasized in relation to the more 'sinful' traits like Orochimaru with his excessive lust for power and immortality.
It's also possible that Kushina, Naruto's mother, could play a significant role even if she's not alive in the main Naruto storyline. The fanfic could explore her love for Naruto in a different way, perhaps through flashbacks or some sort of spiritual connection. And of course, characters like Iruka Sensei or Jiraiya could be involved as they have also shown parental - like affection towards Naruto in different ways.
It's hard to say for sure without reading the fanfiction. But it could be Naruto himself as he is the main character in the Naruto series. Maybe Sasuke could also be involved as he often has his own story arcs. And if it's related to the seven deadly sins and swords, there might be new characters created specifically for this fanfiction that represent each sin and are the keepers or former wielders of the sin - swords.
Sorry, I'm not familiar with this novel, so I can't tell you the author. There are so many novels out there that it's hard to know every single one. You might want to check some literary review websites or ask in a book - lover's forum. They might be able to help you find out who the author is.
Another character could be the Nine - Tailed Fox. Kushina was once the jinchuriki of the Nine - Tailed Fox. When Naruto meets his mother, the topic of the Nine - Tailed Fox might come up. Maybe Kushina could tell Naruto some secrets about controlling the Nine - Tailed Fox's power that she learned during her time as its jinchuriki.
Well, in a '7 deadly sins novel', there could be a character representing lust, someone who is overly driven by sexual desires. There may also be a character for gluttony, who overindulges in food or other pleasures. And of course, there would likely be a character consumed by greed, constantly wanting more wealth or possessions.
Obviously, Naruto is the main character. He is the one who becomes this 'god - like' figure in the fanfic. But there are also other important characters like Sasuke. Sasuke might play a role in either supporting Naruto's new power or being in conflict with him because of it.