The gods could potentially be antagonists. If the pregnancy goes against some divine law or prophecy, they might try to interfere. For instance, Zeus could see it as a threat to the order of things and send his minions to cause trouble for Percy and Bianca.
A group of rogue demigods could also be antagonists. These demigods might be jealous of Percy's status and Bianca's unique abilities. They could form a sort of anti - hero group that tries to undermine Percy and Bianca's quests and cause trouble for them. For example, they might steal important items that Percy and Bianca need for their mission.
It could be the entities that thrive on the disorder in the chaos. They might see Percy and Bianca as threats to their way of life and try to stop them from achieving whatever goal they have in the chaos.
One idea could be exploring how Percy and Bianca deal with the unexpected pregnancy in a world full of mythological challenges. Maybe they have to seek help from the gods or other demigods to ensure the safety of the unborn child.
The main antagonists could be some of the other gods who are jealous of Aphrodite's special situation with Percy. For example, Hera might not like the idea of Aphrodite having a child with a demigod, as it goes against the normal order of things in the godly realm.
The old enemies of Percy and Annabeth like the Titans or some of the more vengeful monsters could be the main antagonists. They might see the unborn child as a threat or an opportunity to get back at Percy and Annabeth.
The other gods who oppose the relationship between Percy and the goddess could be antagonists. They might see it as a disruption of the natural order or a threat to their power. For example, if the goddess is from a certain pantheon and her pregnancy by a mortal like Percy goes against their rules, those traditionalist gods would be against it.
If Percy died instead of Bianca, the entire tone and outcome of the fanfiction could be transformed. It might affect how other characters grow and evolve, and potentially introduce new conflicts and resolutions that weren't present before.
Sure. Fanfiction.net also has a large collection. In some 'Percy loves Bianca' fanfictions, the author might focus on Percy's internal struggle with his feelings for Bianca. Maybe he has to deal with his loyalty to his friends while being in love with her. There could be various plot twists and turns that make these fanfictions really engaging.
One idea could be that Wesley and Bianca face unexpected challenges during the pregnancy. Maybe they struggle with financial issues as they prepare for the baby. Another could be that they discover some long - lost family secrets during this time that add drama to the story.
In Percy and Bianca love fanfiction, a very prominent theme is 'discovery of self through love'. As they fall in love, they also discover new sides of themselves. For example, Percy might find a more gentle side of himself because of Bianca, and Bianca could discover a more adventurous side because of Percy. Also, 'overcoming obstacles' is a theme. There are always things in their way, like the expectations of their friends or the rules of their world, that they have to overcome to be together.