It depends on the specific fanfiction. However, it's likely to include the main RWBY characters like Ruby, Weiss, Blake, and Yang. Ruby, with her leadership and innocence, might be contrasted against the sins in some way. Weiss, with her family background and her own personality traits, could also play a significant role in the context of the seven deadly sins. Blake and Yang too, as they have their own distinct personalities and storylines that could be intertwined with the concepts of the sins.
It depends on the specific version of the story. But often, there could be characters named after or representing each of the seven deadly sins, like Pride, Envy, Wrath and so on. Maybe there are also some characters who are trying to oppose or redeem those with the sins.
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.
The RWBY characters would likely be initially cautious when interacting with those from Seven Deadly Sins. Ruby, with her innocent and curious nature, might be the first to approach and try to make friends. She would be fascinated by the different powers and cultures. Weiss, on the other hand, might be more standoffish due to her pride. She could see the Seven Deadly Sins characters as uncivilized at first. Blake might be more empathetic, especially if she encounters characters dealing with inner turmoil like the sins represent. Yang would probably be ready for a fight or a friendly sparring session right away.
Meliodas is one of the main characters. He's the captain of the Seven Deadly Sins. Elizabeth is also important, with her own story arc related to Meliodas. Then there's Ban, a strong and somewhat wild character.
I don't have enough information to say exactly who the main characters are in 'Seven Deadly Sins Love Story'. It could be characters who embody the seven deadly sins themselves, or it could be ordinary people dealing with the influence of these sins in their love lives.
Meliodas is a main character. He is the captain of the Seven Deadly Sins and represents wrath. He has great power and a complex personality. Elizabeth is another important character. She has a connection to Meliodas and is often involved in the group's adventures. Ban, the Fox's Sin of Greed, is also a key figure. He is a strong fighter with his own backstory.
Since I don't have specific knowledge of this exact 'wrath a seven deadly sins story', in a general sense, there might be a central character who is either consumed by wrath or trying to overcome it. There could also be supporting characters like a mentor figure who tries to guide the wrath - filled character, or an antagonist who provokes the wrath. There may be other characters who are victims of the wrath - driven actions in the story.
I'm not entirely sure as there could be many interpretations. But typically, there would be a character who embodies pride. This could be a noble, a powerful wizard, or just an ordinary person with an inflated ego. There might also be characters who are affected by this proud character's actions, like friends who try to reason with them or enemies who are in conflict with them because of their pride.
I'm not sure as the title doesn't give much away directly. But it could be characters who are either victims of envy or those who are envious themselves, perhaps people from different walks of life.
I'm not sure specifically as the title doesn't give much away. But it could be a character who represents lust, like a seductive figure. Maybe also characters who are affected by this lustful character, such as a naive lover or a moral authority figure trying to stop the spread of lust.