One idea could be a forbidden love story where a human falls in love with a succubus. The succubus is initially only interested in his energy but gradually develops real feelings. Another could be a story set in a magical academy where a succubus uses her kiss to gain an advantage in a competition, but then finds herself falling for one of her rivals.
A unique character could be a succubus who has a moral code that goes against the normal behavior of her kind. Maybe she refuses to harm humans through her kisses and instead uses her powers to heal emotional wounds. You could also give her a distinct appearance, like having wings with a unique pattern or a different - colored aura that reflects her personality.
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.
Moka could be an interesting succubus character in Rosario Vampire fanfiction. Her dual nature as a vampire and having succubus - like traits in some interpretations can lead to really complex storylines. Another could be Kurumu, with her seductive nature which is a characteristic often associated with succubi. She has her own goals and desires that can be explored further in fanfiction.
One common theme is the struggle between the succubus's nature and her desire to be something more. For example, she might be a succubus by birth but wants to break free from the traditional role of seducing and draining energy from humans.
The information you provided is not detailed enough to determine which character the succubus is. Please provide more context or background information so that I can better answer your questions.
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.
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.