Depending on the plot of the fanfiction, there could be a love interest for Pain's daughter. This character could be from a different clan or village. Their relationship could be a key aspect of the story, with all the challenges that come from their different backgrounds and the situation of the ninja world.
One interesting story could be about Pain's daughter growing up in the Hidden Rain Village. She might have unique powers that set her apart from others in the village. Maybe she tries to understand her father's actions and has a moral struggle within herself.
In the fanfiction, perhaps other characters could offer kind words and physical comfort. For example, a close friend could hold the pain's hand and tell them that everything will be okay. The friend might also share their own experiences of dealing with similar situations to make the pain feel less alone.
It could be an original character created just for the fanfiction. Maybe a mysterious ninja woman who crossed paths with Kakashi during a mission and they had a brief but intense relationship.
Her experiences in the ninja world would play a huge role in her development. If she witnesses a great tragedy, it could make her more empathetic or more determined to prevent future disasters. On the other hand, if she experiences great success early on, she might have to deal with the pressure of maintaining that success and not becoming overconfident.
A storyline might involve the OC daughter being trained by Itachi in the ways of the ninja, and she becomes a prodigy. As she grows, she might face challenges in the form of rival ninja who are jealous of her skills or her connection to Itachi. Also, there could be a story where she tries to reunite Itachi with Sasuke in a more peaceful way than in the original Naruto story.
Well, perhaps the story could be about the daughter discovering her own unique abilities that are different from Kakashi's. This could lead to some interesting father - daughter bonding moments as he tries to help her develop those powers. Also, there could be a plotline where the daughter gets involved in a mission that is related to Kakashi's past, and they have to work together to solve it.
A sense of identity is a big theme as well. Growing up as Klaus's daughter, she has to figure out who she is on her own. Is she just defined by her father? Or does she create her own identity? These are the kinds of questions that are often explored in this type of fanfiction, which makes it really engaging for readers who are interested in character - driven stories.
One common theme is self - discovery. The daughter, being in a new life, has to figure out who she is all over again. Another theme is redemption. If she had a difficult past life, she might try to make up for it in her new life. For example, in some fics, she might have been a bad person in her past life and now tries to be good. Also, family relationships are often explored. She has to build new relationships with her new family members.
The role could be that of an outcast. People might shun her because of her father, and she has to find a way to survive on her own. This could lead to her becoming a rogue figure, making her own rules in a world that has no place for her.