Annabeth would be completely devastated. She might go into a state of shock at first, not believing that Percy is really gone. Then she would be filled with anger and a determination to find a way to bring him back, if possible. She could start researching ancient magic or prophecies that might reverse his death.
Grover would be inconsolable. He has been Percy's friend since the beginning, and he would likely blame himself for not being able to protect Percy. He would probably use his nature - related powers to create a beautiful memorial for Percy, like a grove of enchanted trees. And he would also be the one to comfort Percy's mother, Sally, who would be heartbroken.
One scenario could be Percy sacrificing himself to save his friends from a powerful and ancient evil. Maybe he faces off against a primordial being and uses his powers to hold it back long enough for his friends to escape, but at the cost of his own life.
There are also endings where Percy's spirit lingers. He becomes like a guiding force for his friends, even in death. This can be really touching as his friends still feel his presence and are inspired by his memory to keep going and face whatever challenges come their way.
Reacting to Percy Jackson fanfiction is quite an adventure. One aspect that can be really engaging is when the fanfiction delves deeper into the backstories of the minor characters. It gives them more depth and makes the whole universe feel more alive. Also, some fanfictions take a darker turn, exploring the consequences of the battles and the traumas the characters might have endured. It can be a bit different from the original series, but that's the beauty of fanfiction.
Some teachers react positively. They might see it as a sign of students' passion for reading and writing. They could use it to inspire students to explore more about Greek mythology which is a big part of the Percy Jackson series.
The characters' reactions would vary widely. Annabeth would likely be critical of any fanfiction that got the details of her character or her knowledge wrong. She's very intelligent and detail - oriented, so inaccuracies would bother her. On the other hand, if a fanfiction captured her essence well, she might secretly enjoy it. Leo would probably be excited to see all the creative ideas people had in fanfiction, especially if there were cool new inventions or adventures in them.
Annabeth would probably be very worried and take charge. She'd start researching immediately, looking through books in the camp library to find a cure. Grover would be constantly by Percy's side, using his nature - related powers to try and make Percy more comfortable, like bringing in fresh air and plants to help him feel better.
Grover would be panicked. He's Percy's friend and he cares a great deal about him. He might start running around trying to find help, like looking for a healer or someone with magical healing abilities. He'd probably be muttering to himself about how he should have protected Percy better.
A new, powerful demigod who is jealous of Percy's fame and power could be the villain. This demigod has discovered a dark spell that they use on Percy, causing him to slowly die. They want to take over Percy's position as the 'hero' among the demigods.
Maybe Percy is cursed by a powerful god or goddess who is angry with him. The curse causes his life force to slowly ebb away. His demigod powers start to fade too. His friends notice strange things like his sword not being as effective in battle and his ability to control water weakening. They then go on a quest to find the source of the curse and break it.
If it's a well - crafted fanfiction, it might start with an attention - grabbing opening. For instance, if it begins with Percy in a situation that seems impossible to escape from, it immediately hooks the reader. I like it when the fanfiction respects the lore of the original series while still being creative. Maybe it has Percy using his powers in a new and unexpected way.