They can interact in many ways. For example, the succubus could be a foe at first. Naruto might have to use his ninja skills to defend against her attacks. Or, the succubus could be in need of help and Naruto offers his assistance. Another way is that they could be partners in a mission by chance, learning to trust each other over time.
In fanfiction, Naruto and a succubus could interact through a magical encounter. Maybe the succubus is trapped in a genjutsu - like situation and Naruto, with his strong will, is able to break it. This leads to the succubus being grateful and following Naruto around for a while. They could also interact in a more comical way, like the succubus trying to seduce Naruto but Naruto being completely oblivious to her advances because he's so focused on his training or his next mission.
Naruto would probably be very curious about the succubus. He might start by asking a lot of questions. He's not one to be easily intimidated, so he'd likely approach her without much fear.
A succubus could fit in as a new type of threat. Since the Naruto world already has various threats like the Akatsuki, a succubus with her seductive powers and ability to drain energy could be a unique enemy. For example, she could target the tailed beasts to gain their powerful chakra.
In fanfiction, they might interact as friends who share their dreams. Naruto could tell Bulma about his dream of becoming Hokage and bringing peace to the ninja world, while Bulma could share her aspiration of creating more advanced technology. Their conversations could be really interesting as they come from such different backgrounds.
They could interact as teacher and student. Raiden, with his knowledge of lightning and combat, could teach Naruto new skills.
It's hard to say if it's generally popular. It's a very niche concept within the Naruto fanfiction world. Most Naruto fans are more interested in traditional storylines that stay true to the original themes of the series. However, there may be a small subset of fans who enjoy this kind of unique and off - beat take on the character.
One possible aspect to consider in Naruto and Succubus fanfiction is how the two different worlds collide. Naruto's world is full of ninjas, chakra, and complex power systems. A succubus, coming from a more supernatural or mythological realm, would introduce new elements. Maybe the succubus is attracted to Naruto's strong chakra, or perhaps Naruto has to face the challenge of a succubus causing chaos in his village. This could lead to interesting storylines where Naruto has to use his ninja skills in new and unexpected ways to deal with the succubus.
It would change the power dynamics. With her succubus powers, fem Naruto could disrupt the traditional balance of strength. For instance, she might be able to defeat stronger opponents more easily by using her charm and allure.
Another way of interaction could be through a character who bridges the two worlds. Let's say there is a half - mermaid, half - human character. This character can introduce Naruto to the mermaid world and help the mermaids understand the ninja world, facilitating interactions between different characters from both worlds.
If Courtney is a healer in the fanfiction, she could patch up Naruto after a tough battle. They would then have a heart - to - heart conversation about their dreams and fears. Naruto might share his goal of becoming Hokage and Courtney could talk about her own goals, which might be something like making the ninja world a better place in her own small way. Another way they could interact is if Courtney gets kidnapped by an enemy. Naruto would then go on a rescue mission, and during the rescue, they would bond over their shared experience.
They could start by being suspicious of each other. For example, Homura might think Naruto is a threat to her mission (if she has one in the Naruto world) with his powerful jutsu. Naruto could be confused by Homura's strange technology and time - stopping powers. But then, as they see each other's determination, they start to respect one another and communicate. Maybe Homura helps Naruto by using her time - stop to give him an advantage in a fight, and Naruto in return protects Homura from some of the more dangerous ninja in his world.