Perhaps they start off as enemies, not knowing their relation. But as the story unfolds, through various battles and interactions, they begin to suspect that there is more to their connection. It could be that they both have a strange mark on their body that is only found in their family, which leads them to uncover their relation. And then they have to decide whether to continue as enemies or join forces.
In some fanfictions, there could be a situation where Naruto is affected by a powerful genjutsu that no one else can break. Konan, with her unique skills and perhaps some knowledge about the caster of the genjutsu, manages to save Naruto. It could be that she has to go through a series of trials or battles to get to the source of the genjutsu and free Naruto. This could also lead to a deeper connection between Naruto and Konan as they work together to find out who is behind the genjutsu and prevent further attacks.
One possible plotline could be their adventures together before joining the Akatsuki. It could show how they discovered their powers and how they started to form a bond. Another plotline could be about their efforts to rebuild Amegakure after the war. They could be shown working together to bring peace and prosperity to their village.
On a more emotional level, it could mean a lot to Naruto and Konan themselves. Naruto, who has always been searching for family, would gain a new family member. And Konan, who has lost so much, might find a new purpose or connection through this relation. It could lead to some really interesting character development for both of them.
One possible plotline could be that Naruto is an orphan found by a different ninja clan. He grows up with different values and skills, and his path crosses with Kushina in a completely non - family - related way. For example, they could meet as rivals in a ninja tournament. Another plotline might involve Naruto being from another village entirely and coming to Konoha on a mission where he teams up with Kushina to fight a common enemy. They then form a bond based on mutual respect and shared experiences rather than a family connection.
It might be for the greater good. If Obito's actions in the fanfic are leading to destruction on a large scale, Konan, being a protector of sorts, decides to take him out to save the world or at least her part of it.
One possible plotline could be her backstory. Maybe she was a great kunoichi in her youth and had some epic adventures that are now forgotten or not well - known. This could be explored in a fanfiction.
One possible plotline could be that the succubus is actually a misunderstood being. Naruto, with his big heart, tries to help her fit into the ninja world without causing chaos. They could go on missions together and she uses her unique abilities in a non - sexual way to assist Naruto, like using her charm to distract enemies while Naruto attacks from the side.
One possible plotline could be that fem Naruto and shadoclone Naruto team up to face a new and powerful enemy in the Naruto universe. They could combine their unique skills and abilities to defeat this threat. For example, fem Naruto might use her agility and quick thinking, while shadoclone Naruto uses his shadow - like powers in a strategic way.
One reason could be to add a romantic or sexual tension element. Since they are both important characters in the Naruto universe related to the Akatsuki, exploring a relationship between them in a more intimate way can make the story more interesting for some readers.
In this fanfiction, Naruto may save Konan through his ability to understand and connect with people. Maybe Konan is in a psychological crisis, feeling lost or conflicted. Naruto, with his kind heart and his own experiences of overcoming hardships, talks to Konan. He gives her the strength and hope she needs to get out of her difficult situation. His words are like a life - saving jutsu, bringing Konan back from the brink and saving her in a very different, yet equally important way.