One common theme could be adventure. Given the nature of the source material (assuming it has elements of action or exploration), fanfics might explore new adventures for the characters.
Some fandom - specific forums or communities might also host boa sandersonia fanfic. These are often more niche but can have some really creative and unique works. You could try joining relevant groups on social media platforms and asking for recommendations from other fans.
One common theme is adventure. Since it's set in the One Piece world, the OC and Boa often go on exciting adventures together. Another theme is love or at least a strong attraction. Their relationship, whether it's a slow - burn or an instant connection, is usually a central part of the story.
Well, I've heard of 'A Meeting with Boa'. In this fanfic, the OC's backstory is intertwined with Boa Hancock's. It starts with an unexpected encounter on an island. The author does a good job of creating tension and chemistry between the two characters. It's definitely worth checking out if you like this kind of fanfic.
Another option could be a new character introduced specifically for the fanfiction. This character could be a powerful pirate or a mysterious figure from Hancock's past. He might have a connection to Hancock's family or her position as a Shichibukai. His presence would add an element of mystery and new dynamics to the story, especially in relation to the pregnancy.
In a Mihawk x Boa fanfiction, the plot could revolve around a mission. Let's say the World Government tasks Mihawk with keeping an eye on Boa because they suspect she might be planning something against them. Mihawk, being the stoic character he is, accepts the mission. Boa, on the other hand, quickly realizes she is being watched. At first, she tries to get rid of Mihawk, but he proves to be a difficult adversary. As time passes, they start to understand each other's motives. Boa's reasons for her actions might be related to protecting her island and people, and Mihawk might start to respect her for that. This could lead to a change in their relationship from one of animosity to mutual understanding and maybe even love.
The theme of acceptance is also present. Hancock has a rather difficult past and her feelings for Luffy make her question a lot of things about herself. Fanfictions will sometimes focus on how Luffy's simple and accepting nature helps Hancock come to terms with her own identity and insecurities, and how she in turn becomes more integrated into Luffy's world.
In fanfiction, they might have an interesting dynamic. Luffy's innocent and straightforward nature could be contrasted with Boa's more complex and initially cold personality. Maybe they start as unlikely allies. For example, they could team up to face a common enemy in the fan - made story, gradually learning to understand and respect each other.
There's also a fanfiction where Hancock decides to join Luffy's crew for a short time. This one delves into how the rest of the Straw Hat crew reacts to her presence. Luffy is his usual oblivious self while Hancock tries to fit in but still maintain her regal air. It's really interesting to see how their relationship develops during this time.
One possible fanfic could be about Luffy's brother Ace meeting Boa Hancock. Maybe Ace could be on a mission near Amazon Lily and they cross paths. He could be initially curious about her powers and her reputation as a beauty. Another idea is a fanfic where Hancock falls for Luffy's brother because he shows some of the same fearless and kind traits as Luffy, but in a different way. It could explore how their relationship develops in the complex world of One Piece.