The baby might have Percy's dark hair, as that's a distinct feature of his. And perhaps it would have Hera's piercing eyes, which are often described as having a certain regal quality. It could also have a sort of glow about it, a combination of Percy's heroic aura and Hera's divine presence.
Well, considering Percy's tanned complexion from all his adventures outdoors, the baby could inherit that. And with Hera's influence, the baby might have a very noble - looking face structure. Maybe the baby would have a small, golden - hued mark on its forehead, symbolizing its connection to both Percy and Hera, like a little sunburst or something similar that gives off a faint light.
Well, it could be that the baby has a mix of Mal and Ben's features. Its skin tone might be a blend of Mal's slightly tanned complexion and Ben's fair skin. The baby's hair could be a lighter shade of purple, like a pastel purple, and it could have Ben's strong jawline. Also, the baby might have a small, cute nose that is a bit like Mal's.
Since Luffy has a tanned complexion and Robin is fair - skinned, the baby could have a unique skin tone that's a blend of the two. The baby's build could be small and cute at first but with the potential to grow strong like Luffy. It might also have Robin's long fingers, which could be a sign of future dexterity.
The baby might have Ivy's green - tinted skin, a sign of her connection to plants. And perhaps Harley's bright blue eyes and a wild, unruly shock of hair like Harley's pigtails.
Well, one possible plot could be that their baby has some sort of unique power. Since Percy is a demigod with special abilities like controlling water, and Hera is a powerful goddess, their child might inherit a blend of powers. Maybe the baby has the power to control the weather, as it combines Percy's elemental connection with Hera's association with the sky. This could lead to all sorts of adventures where the baby has to learn to control its powers while facing threats from other mythological beings who are either jealous or see the baby as a threat to their own power.
The baby could bring new hope to the demigod community. If it has strong powers, it might inspire other young demigods. For example, if it can easily control water like Percy and also has Piper's charm - speaking, it could be a great leader in the future battles against the Titans or other threats.
Grover would probably be really excited. He might bring all kinds of nature - related gifts for the baby, like a special plant that has protective powers. He would also be very protective of the baby, using his nature senses to detect any danger.
The baby might be very inquisitive. With Athena as its mother, it would inherit a thirst for knowledge. It could constantly be asking questions, eager to learn about the world around it, whether it's the secrets of the ocean (from Percy's side) or the wisdom of the heavens.
Jason and Piper would be very supportive. They'd offer their help, like babysitting or providing resources. Piper might use her charm - speak ability to soothe the baby when it's fussy, and Jason could use his leadership skills to help Percy and Annabeth make important decisions about the baby's future.
Their relationship would likely become more centered around the baby. They'd have to communicate more about parenting decisions.
The baby would change their lives a great deal. They'd have to be more cautious as they can't just rush into danger like before. Their focus would shift from just themselves and their adventures to protecting and raising the baby.