One great plot idea could be them going on a spiritual journey together to discover more about their unique bond as soulmates. They might encounter new Hollows or spiritual beings that test their relationship.
Another interesting plot could be a time - travel scenario. Maybe they get sent back in time to when they first met, but with their current knowledge of being soulmates. They could then change some events that happened in the past, for better or worse. This would create a lot of interesting character development and relationship exploration as they see how their actions in the past affect their present and future as soulmates.
One idea could be that Ichigo and Rukia find themselves in an alternate universe where their roles are reversed. Rukia could be the one with the Shinigami powers from the start in Karakura Town, and Ichigo is a normal human who gradually discovers his own latent spiritual abilities to help her. Another could be that they are sent on a special mission together to a realm neither has been to before, like a dimension full of lost souls. There, they have to rely on each other more than ever to find their way back and complete their task.
Another plot could be that there's a powerful enemy who tries to use Rukia and Ichigo's feelings against them. They have to fight not only the external threat but also their own growing desires for each other, which leads to some tense and steamy moments in the fanfiction.
It could be about their journey of discovery of each other as soulmates. Maybe they start off as strangers in the Bleach universe and gradually realize their deep connection through shared experiences like fighting Hollows together.
Let their relationship grow gradually through shared experiences. They fight side by side against Hollows. Each battle they face together deepens their connection. Also, small moments like when Rukia helps Ichigo understand his powers better or when Ichigo protects Rukia from danger are important. These moments build trust and respect, which are key to a realistic relationship development.
One popular theme is adventure. Writers often create new adventures for Rukia and Ichigo, where they face powerful enemies together and their relationship deepens through these challenges.
In Ichigo x rukia x orihime fanfiction, Ichigo is typically a complex character with a lot of depth. His relationships with Rukia and Orihime are multi - faceted. Rukia might be shown as a strong - willed and capable partner for Ichigo in the fight against evil. Orihime is usually the one who provides a more tender aspect to Ichigo's life. Fanfiction writers may use different scenarios, like battles or moments of self - discovery, to explore how Ichigo interacts with both Rukia and Orihime, and how their relationships develop over time.
You can try websites like FanFiction.net or Archive of Our Own. They have a large collection of fanfictions including rukia x ichigo ones. Just use the search bar on these sites and type in 'rukia x ichigo' to find relevant stories.
One idea could be that their pregnancy is a result of some kind of magical or spiritual event in the Bleach universe. Maybe an ancient spell gone wrong or right, depending on how you look at it. For example, a spell that was meant to protect Soul Society actually ends up causing Rukia to become pregnant. Another plot could involve the two of them having to hide the pregnancy at first because it goes against some Soul Reaper rules or traditions. They then have to deal with the consequences of keeping it a secret while also preparing for the arrival of the baby.
One plot idea could be that Hollow Ichigo and Rukia are forced to team up against a new, powerful enemy that threatens both the Soul Society and the world of the Hollows. They start off distrusting each other but gradually learn to work together and understand each other's motives better.
One idea could be that Arrancar Ichigo has to protect Rukia from a new, powerful enemy in Hueco Mundo. Since he has Arrancar powers, he has a different fighting style and perspective, which could lead to some really intense battle scenes and a deeper understanding between them.