Well, Percy is a very brave character. When he meets Cthulhu in fanfiction, he would first be in awe of the sheer size and otherworldly presence of Cthulhu. His first reaction might be to try and communicate, thinking that there could be some way to reason with this being. But as Cthulhu's madness - inducing powers start to affect him, he would realize that he needs to get away and find a way to protect his friends and the world from this new threat. He would then start to think about using the elements around him, like the water, in a more creative way to try and hold Cthulhu at bay. He might also seek the help of the gods, but he would know that they might be just as afraid of Cthulhu as he is.
Percy would probably be both terrified and intrigued. He's used to facing powerful monsters, but Cthulhu is on a whole different level. He might initially try to attack Cthulhu out of instinct, but quickly realize that his usual weapons and powers might not be enough. So he would likely retreat and try to come up with a more strategic plan.
Percy would probably be cautious. He's been through a lot with the Greek gods, and he knows how powerful divine beings can be. So, he'd approach this new encounter with wariness.
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.
Percy might be a bit curious too. He's used to strange things, and meeting someone related to such a powerful dark wizard could pique his interest. He could try to figure out if the grandson has the same evil intentions as Voldemort. He'd likely keep his distance at first, but as he observes the grandson, his reaction could change.
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.
In a fanfiction, perhaps the gods in the Percy Jackson universe are aware of Cthulhu as an ancient and powerful being from another realm. They send Percy on a quest to learn more about Cthulhu's weaknesses in case he ever wakes up fully. Percy teams up with some of his demigod friends and they encounter all sorts of Lovecraftian horrors along the way. They soon realize that Cthulhu's power is far greater than anything they've ever faced and they have to rely on their wits and some newfound magic to survive.
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.
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.
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.
His first reaction might be shock. Dragons aren't exactly common in his world, even with all the mythical creatures. But then his hero instincts would kick in. He could try to befriend the dragon, thinking it could be an ally in future battles against the Titans or other enemies. He might offer it some food, like a fish or something, to gain its trust.
Percy would feel a deep sense of guilt as well. He might think that he should have been there to protect her. So, he would be determined not only to free her but also to make sure whoever is responsible pays for what they've done. He would use his powers over water to his advantage, like creating distractions or using water to weaken the enemy's defenses while he tries to reach Annabeth.