A more complex plot could be a time - travel scenario. Maybe Botan travels back in time to the early days of Naruto's life. She could influence events in a way that changes the future of the Naruto universe, and they both have to deal with the consequences of those changes.
You can try fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of Naruto fanfictions, and you might be able to find some that also involve Botan. Just use the search function on those sites and look for relevant tags.
Typically, in hiei and botan lemon fanfiction, there would be a focus on the relationship between Hiei and Botan. The 'lemon' part might suggest some romantic or even mildly steamy interactions. There could be a lot of emotional exploration between the two characters, as they come from different backgrounds in the original Yu - Yu Hakusho story.
One idea could be that they discover the pregnancy unexpectedly. Maybe they are in the middle of a mission or some important event in their world when Botan starts to feel unwell. It leads to the realization of the pregnancy. This could cause a stir among their friends and allies as they are both important characters. And they have to quickly adjust their lives and plans to accommodate the new addition on the way.
One possible plot could be that Naruto and Kiriya Botan meet during a mission in a mysterious forest. They initially have some misunderstandings due to their different backgrounds, Naruto being from Konoha and Botan having her own unique upbringing. However, as they face various challenges together, like fighting off a powerful and rare beast, they start to understand and respect each other. Eventually, they form a strong bond and become friends, or perhaps something more, as they continue to explore the ninja world together.
The main characters would obviously be Naruto and Kiriya Botan. Naruto is a well - known ninja from the Hidden Leaf Village, famous for his determination and his powerful jutsu like the Rasengan. Kiriya Botan is another character, perhaps from a different village or clan, with her own set of skills and personality traits that would interact with Naruto's in the fanfic.
There could be an old - fashioned lemonade tycoon as the antagonist. He has a monopoly on lemonade sales in the area and sees Botan's new and innovative lemonade recipes as a threat to his business. So, he uses his wealth and influence to try and drive Botan out of the lemonade - making business, creating all sorts of obstacles for her along the way.
Obviously, Hiei and Botan are the main characters. Hiei, with his dark and mysterious past, and Botan, who is usually associated with guiding souls. In the context of the pregnant fanfiction, they are the focus as their lives are about to change completely with the impending arrival of a new life.
One possible plot could be that they are brought together by some strange supernatural event that causes Botan to become pregnant. Hiei, being his usual brooding self, might initially struggle with the idea but then gradually grow to accept and protect Botan and their unborn child.
In fanfiction, the fact that they come from different parts of the Yu Yu Hakusho world adds to the allure. Botan is a guide to the afterlife and Hiei is a demon. Their different backgrounds and the potential for them to bridge the gap between their worlds can create complex and exciting plots. For example, a story could explore how they deal with the cultural differences between the spirit world and the demon world while falling in love. There could be conflicts arising from their respective duties and loyalties, which can be delved into in great detail in fanfiction.