Piper could be a godparent as well. She is very perceptive and could help the baby understand emotions and how to use charm speak in a positive way.
Jason could also be a godparent. He was a great hero and had a strong bond with both Percy and Annabeth. He could pass on his leadership skills and sense of honor to the baby.
A plot could involve Percy and Annabeth going on a quest right before they find out about the baby. During the quest, Annabeth starts feeling unwell, and they discover she's pregnant. They then have to cut the quest short and race back home to ensure the safety of the baby. Once back, they share the news with their friends, and everyone pitches in to help them get ready for the new arrival, like building a nursery and gathering baby supplies.
The Percabeth baby at camp in fanfiction could be a central figure in a series of adventures. It could start with the baby being fussy one day, and it turns out that there's a minor monster lurking nearby that only the baby can sense. As the baby grows, it could start to show an affinity for both water and architecture, just like its parents. This would make it a unique and important part of the camp, and perhaps the baby would even be seen as a symbol of hope for the future of the demigods at camp.
The main characters are Percy and Annabeth from the Percy Jackson series. Percy is a demigod son of Poseidon and has special powers related to water. Annabeth is a smart and brave demigod daughter of Athena. In the context of the secret baby fanfiction, they are the parents of the secret baby.
The baby could be a very energetic and curious little one, always getting into things around the house, much to the amusement and sometimes exasperation of Harry and Susan.
Well, they could end up in a time when the gods were more actively involved in mortal affairs. Percabeth might get caught up in an ancient war between the gods. They'd have to use their wits and skills. Percy would be in his element with water - related challenges, and Annabeth could use her knowledge of ancient history to navigate the complex situations of the past.
One great 'percabeth baby fanfiction' is 'The New Adventure of Percabeth and Their Little One'. It beautifully portrays how Percy and Annabeth adjust to life with a baby, with cute scenes of Percy trying to change diapers for the first time. Another one could be 'Percabeth's Family Expansion' which focuses on the challenges and joys of raising a baby in their demigod world.
Most likely, the baby would be received with a mix of excitement and caution. The campers would be excited because it's a new addition, but also cautious as they don't want any harm to come to it. Some might be a bit overprotective right away.
In this fanfiction, there might be some werewolves who view the baby as an abomination since it's part vampire. They could try to harm the baby, which would put Bella and Stefan in a difficult position to defend their child.
The Volturi could be antagonists. In the Twilight universe, they are the powerful vampire coven that enforces vampire laws. They might see the baby as a threat to their power or a violation of their rules. They could try to eliminate the baby or control Bella, Edward, and their family.
One possible antagonist could be an evil scientist who wants to study the baby's unique genetic makeup. Since Shadow and Blaze are both special characters, their baby would likely have an interesting genetic combination that the scientist could use for his own malicious purposes.