The main characters are most likely Annabeth and Percy. Since Annabeth is the one who is pregnant, she would be a central figure. And Percy, being her partner, would play a crucial role in protecting her and the unborn child in Tartarus.
Well, Annabeth and Percy are bound to be the main characters. However, depending on how the fanfic is written, other characters from the series could also be involved. Maybe Nico, with his knowledge of the underworld, could be a significant character. He could help Annabeth and Percy understand the unique circumstances of the pregnancy in Tartarus and guide them to places that could offer some form of protection or assistance for the baby.
One possible plot could be that Annabeth and Percy are in Tartarus. They face numerous challenges while Annabeth is pregnant. Maybe they have to find a way to protect the unborn child from the terrors of Tartarus, like hiding from monsters that are specifically attracted to the new life force. They might also encounter some friendly or at least neutral entities in Tartarus that offer help in exchange for something.
Percy would become a fierce guardian. He'd use his skills in combat and his connection to water to create barriers and defenses around Annabeth. Annabeth would be using her wits to analyze their situation. She'd try to figure out if there are any hidden powers or advantages in Tartarus that could help them during the pregnancy. The other characters like Grover might try to use his nature - related abilities to find food and resources that are safe for Annabeth to consume. And they'd all be praying to the gods for some sort of miracle or assistance, while also being prepared to face whatever challenges come their way without relying too much on divine intervention.
One popular type of fanfic could be about Percy and Annabeth's journey through Tartarus. It might focus on their struggles, like how they face the various terrifying monsters there. Maybe they use their unique powers and the bond between them to survive. For example, Percy's control over water could be crucial in crossing some of the dangerous rivers in Tartarus, while Annabeth's wisdom helps them make smart decisions when choosing paths in that dark and chaotic place.
Percy might develop more of a steely determination. In Tartarus, he has to face extreme danger, which could make him even more resolute in protecting Annabeth and getting out. Annabeth, on the other hand, could become more resourceful. She'd have to use her wits in this strange and deadly place.
In this fanfic, Percy could develop a darker side. The horrors of Tartarus might make him more ruthless when it comes to protecting himself and Annabeth. Annabeth, on the other hand, may become more empathetic. She could see the pain and suffering of the other beings trapped in Tartarus and try to help them, which would shape her character in a new way. Also, their relationship would develop further. They would have to trust each other completely, and this could lead to a more mature and deep connection between them.
Obviously, Percy would be the main character. He's the one stuck in Tartarus, so the story would revolve around him. Maybe Annabeth could also be an important character, even if she's not physically in Tartarus with him. Her thoughts and attempts to rescue Percy from afar could be part of the story.
There could be some minor gods or spirits that have been trapped in Tartarus but are still benevolent. These could be beings that Percy and Annabeth come across and who decide to help them in their journey. For example, a spirit that has knowledge of the layout of Tartarus could guide them away from the most dangerous areas. Another possibility is some half - forgotten heroes who have been in Tartarus for a long time and have developed unique skills to survive, and they join forces with Percy and Annabeth.
Percy might become more cautious. After facing the extreme danger in Tartarus, he realizes that his impulsive nature could have more serious consequences. Annabeth, on the other hand, could become more empathetic. She saw Percy at his most vulnerable in Tartarus and now understands the importance of emotional support better.
They are popular because Percy and Annabeth are beloved characters. Their journey in Tartarus is full of action and adventure, which makes for exciting fanfic material.
Obviously, Percy and Annabeth are the main characters. But we could also see some of their demigod friends like Grover. Grover might stop by to check on them and end up getting involved in the babysitting chaos. Maybe Chiron could also make an appearance, giving Percy and Annabeth some advice on how to handle the kids.