There may not be mainstream popular 'Artemis kills Percy' fanfics because it goes against the typical heroic image of Percy. Most fans like to see Percy succeed and be the hero. But in some smaller, more experimental fanfic communities, there could be some interesting takes on this concept that have a following among those who enjoy exploring darker or more unconventional storylines.
The balance in nature would be disrupted. Artemis is the goddess of the hunt, the moon, and nature. Her death could cause strange phenomena in the natural world, like animals going wild or the moon's cycle becoming erratic. This would not only affect the demigods but also mortals who depend on the stability of nature.
The story would take a very dark turn. Percy is a central figure, and his death would leave a huge void. His friends would be devastated. Annabeth, for instance, would likely be consumed with grief and seek revenge. This could lead to a new conflict within the demigod community.
One possible 'Artemis kills Percy' fanfic could be a story where there's a misunderstanding. Maybe Artemis is under a spell that makes her think Percy is a great threat to the natural order she protects, and in the heat of the moment, she takes action. Another could be a darker, alternate universe fanfic where the gods' personalities are twisted, and Artemis has been corrupted into believing Percy is an enemy she must eliminate.
One possible reason could be a misinterpretation of a prophecy. Maybe Artemis believes Percy is a threat to the natural order she protects based on a wrongly interpreted prophecy. For example, if a prophecy was worded ambiguously and she thought Percy would bring destruction to the wild, she might take drastic action.
One possible motive could be some sort of mind control. Maybe a powerful enemy has the ability to control Percy's actions and forces him to go after Artemis. This would add an element of tragedy as Percy would be acting against his will.
There could be. Fanfiction allows for all kinds of wild ideas. Given that Percy is a character in the Harry Potter series and Voldemort is the main villain, it's not surprising that someone might come up with a story where Percy manages to kill Voldemort. It might be a really unique read, delving into how Percy, with his own set of skills and personality traits, could achieve such a feat.
Yes, there might be such fanfictions in the vast world of fan-created content. However, it would be a rather dark and non - canonical take on the relationship between the characters, as it goes against the general narrative where they are more often allies or rivals in a less fatal way.