One possible plot could be that they accidentally get pregnant and then have to deal with the reactions of their friends and the ninja world. There could be a lot of drama as they try to figure out how to handle the situation while also facing their own personal feelings for each other.
I'm not sure if there are many popular ones specifically about that. However, you could try searching on fanfiction platforms like FanFiction.net or Archive of Our Own. Maybe look for Naruto - related fanfiction (since Suigetsu and Karin are from Naruto) and then filter through the stories to find ones that might touch on this idea.
One common plot is that Karin uses her unique abilities as a sensor - type ninja to get closer to Suigetsu in a seductive way. For example, she might sense his emotions and use that knowledge to her advantage. Another plot could be that they are on a mission together, and Karin decides to try and seduce Suigetsu to make the mission more interesting or to gain some sort of upper hand. Sometimes, it might also involve a love triangle situation where Sasuke is somehow involved, and Karin's seduction of Suigetsu is a way to make Sasuke jealous.
I'm not sure specifically about 'lemon' fanfics (which often imply adult content), but there are many great fanfics about Suigetsu and Karin that focus on their relationship development in a more general way. You can try searching on fanfic platforms like FanFiction.net or Archive of Our Own and filter for stories tagged with their names.
Yes, there are many. Some might focus on their adventures together in the Naruto world, exploring their unique dynamics. For example, a fanfiction could be about them teaming up on a mission and gradually realizing their feelings for each other during the process.
In the Naruto universe, Karin seducing Suigetsu is more likely to be just a fanfiction concept. Their personalities are quite different. Karin is often very focused on Sasuke, and Suigetsu has his own goals and a rather brash personality. While in fanfiction, authors can create all kinds of scenarios for them to interact in a seductive way, it doesn't seem very likely within the main storyline's character dynamics.
One common theme is the exploration of their unspoken feelings. Since they are both part of the Naruto universe, there could be a lot of tension between them that fanfictions like to play with.
One possible plotline could be them going on a journey together. They might start off bickering like they often do, but as they face challenges on the road, they gradually become closer friends. For example, they could be searching for a rare ingredient for a medical experiment Karin is doing, and along the way, Suigetsu protects Karin from various threats.
There could be. In the world of fanfiction, there are often different interpretations. Some might write it in a way that is more about the friendship between Naruto and Karin evolving into something deeper, and the pregnancy could be just a plot device to explore themes like responsibility, family, and the future, without delving into any improper content.
Yes, there might be some out there. However, such fanfictions can vary greatly in quality. Some might focus on exploring complex relationships within the Naruto universe in a creative way. But it also depends on personal taste. If you're interested, you can search on fanfiction platforms and read reviews to find ones that are considered well - written.