Maybe the child would have the power of camouflage like Artemis's hunters, but in a water - based form. They could blend in with the ocean currents or the mist that often surrounds Percy. And, considering Percy's demigod strength, the child would be physically strong as well. Their combat skills would be a blend of Percy's sword - fighting abilities and Artemis's archery skills, making them a formidable opponent in any battle.
The child could have powers related to water like Percy, since Percy is his father. And also powers related to the moon and hunting from Artemis. Maybe the ability to control moonlight to blind enemies or make it easier to hunt at night.
His power over water could also be used in a more spiritual way. He could communicate with the water spirits and ask them for help in healing Artemis. The water spirits might then infuse the water Percy uses with their own magic, making it more potent for healing. Percy could then use this enchanted water to heal Artemis' internal injuries as well as external ones.
One possible reason could be a misunderstanding. Maybe Percy accidentally disrupted one of Artemis's hunts or sacred rituals in the fanfic. Another reason might be that some prophecy or fate in the fanfic's made - up world has pitted them against each other. For example, if there's a prophecy that Percy's actions will somehow limit Artemis's power or freedom in the future.
It could be a child of a minor god who has been overlooked. Maybe the child of Hecate, a young demigod with some really interesting magic powers that Percy and Artemis see potential in.
The plot could be about Artemis trying to balance her duties as a goddess and being a mother. Maybe the child has some special powers that attract the attention of other gods or mythical creatures.
He would likely have enhanced hunting skills, similar to those of Artemis. This could include super - sharp senses, like being able to see in the dark really well or track any creature easily. And from Orion, he might inherit great physical strength. He could be able to lift heavy objects or fight with more power than an ordinary demigod.
A plot could involve Percy being cursed and the only way to break the curse is to sing a song that moves Artemis. He has to learn about her past, her values, and her likes in order to create the perfect song. Or perhaps Percy discovers a new power within himself - the power of song - and he decides to test it out on Artemis, not knowing how she will react. This could lead to a series of adventures as he tries to make amends if she is initially offended.
It could be a mortal man that Artemis fell in love with in secret. Maybe a skilled hunter who caught her eye in the forest one day.
Their relationship could become more united. They would have a common goal of raising their child. Percy would respect Artemis more as a mother and Artemis would see Percy in a new light as a father. There might be some initial awkwardness due to their different backgrounds, but over time, they would grow closer. They would start to understand each other's values more deeply and find ways to incorporate them into raising their child.
One common theme is the struggle of the child to fit in. Since they are the offspring of Percy and Artemis, they often have powers and abilities that set them apart. Another theme is the discovery of their identity. They have to figure out who they are in relation to their two very different parents.