Since I haven't read 'the real daughter is back light novel', I can only guess the main characters. The real daughter is surely one of the main characters. She is likely to be a strong - willed person to face the difficult situation after coming back. There may be a step - sister or someone who took her place in the family. And, of course, there could be a love interest, a young man who will play an important role in her story, either as a supporter or as someone she has to win over.
Without having read the novel, it's hard to say for sure. However, we can assume that the real daughter is a central character. She's likely to be a complex character, dealing with feelings of displacement and a desire for acceptance. Her family, including her parents and potentially siblings, would also be important characters. There might be a character who is the antagonist, perhaps the false daughter who has been living in the real daughter's place and is reluctant to give it up. And there could be a helper or a love interest, someone who helps the real daughter in her quest to reclaim her identity and rightful place in the family.
I'm sorry I don't know the exact main characters as I haven't read the novel. But usually, there would be the real daughter herself. There might also be her family members, like her parents who may be deceived by the false daughter. And perhaps there could be a male lead who gets involved in the real daughter's journey of reclaiming her place.
Well, from what I've heard about similar light novels, in 'the real daughter is back light novel', it could be that the real daughter comes back to a family that has been deceived into believing someone else is their daughter. She might have to prove her identity and then face the emotional turmoil of a family that is in a state of shock and confusion. There could also be elements of revenge as she might want to take back what was stolen from her, like love, inheritance, or status.
The main character is the daughter of the emperor, of course. There may also be other important characters like the emperor himself, her mother if she is in the story, and perhaps some court officials or servants who play significant roles in her life.
There's no way to accurately determine the main characters without having read the 'going back and forth light novel'. It could be a young hero on a quest, or perhaps a group of friends who are all involved in this back - and - forth journey. It really depends on the specific plot and genre of the light novel.
Since we know so little about 'Spirit Real Light Novel', we can only make general assumptions. The main character could be a loner at first, someone who feels out of place in the normal world but then finds a sense of belonging in the spirit world. There might be a group of friends that the main character makes along the way, each with their own unique skills or backstories. And of course, there would probably be some sort of powerful spirit entity that plays a crucial role, whether as an ally or an enemy depending on the direction of the story.
Obviously, the daughter is one of the main characters as she is the final boss. There may also be a father or mother figure who plays an important role in the story, perhaps trying to understand or deal with their daughter's situation.
Since I haven't read it, I can't say for sure. But it's likely that the duke's daughter herself is a main character.
Marty McFly and Doc Brown are most likely to be the main characters. They are the central figures in the 'Back to the Future' franchise, so it's expected that they would be the focus in this fanfic set in 2015.
Since we don't have the full story, it's hard to say exactly who is involved. But likely, there would be the parents or guardians of the daughter, and perhaps some sort of middlemen or those who have the daughter in their possession in an improper way, like kidnappers or corrupt adoption agents.
Obviously, the duke's daughter is a main character. But there might also be her family members like her father, the duke, and perhaps her mother. There could be servants or friends around her as well.
In light novels like this, there may be characters from outside the kingdom who come into contact with the king's daughter. For example, envoys from other countries or adventurers passing through. These characters could introduce new ideas and challenges to the main character. They might also be potential allies or threats, depending on the political situation of the kingdoms. And perhaps there is a character, like a childhood friend, who has been with the king's daughter since she was young and provides emotional support throughout her journey.