Maybe it's a strict teacher or mentor in their world. If they are breaking some rules, like skipping important training or lessons, the teacher or mentor could catch them. This would then lead to some form of punishment or a lecture about responsibility in the 'nico and will get caught fanfiction'.
Well, in Nico and Will kiss fanfiction, often the writers focus on the build - up to the kiss. They might describe the characters' feelings leading up to that moment, like Nico's initial hesitations or Will's determination. It's also a great way to bring in elements of their personalities and how they interact with the world around them in the context of this romantic moment.
Yes, they might. In many fanfictions, the authors like to explore different relationships and bring characters together in unique ways. There could be a slow - burn build - up of their relationship, starting from friendship and evolving into something more romantic as the story progresses.
Well, they might use their combat skills. Percy, with his control over water, could create barriers or use water attacks against threats. Thalia, with her lightning powers, can strike down enemies. They could also use their strategic thinking, like leading Nico to safe places and standing guard over him while he rests or recovers his strength.
The camp leaders might betray them. If there is a power struggle within the camp, and Percy and Nico are seen as threats to the current leadership's power, the leaders could set them up. They could make it look like Percy and Nico are breaking camp rules or endangering the other campers, which would lead to the rest of the camp turning against them.
Yes, there are many. You can look for ones on platforms like FanFiction.net. Just search for 'Percy and Nico friendship' and you'll find a lot of great stories that focus on their bond as friends, like adventures they might go on together or how they support each other in the face of challenges.
It's probably not a common type of fanfiction. There are many different types of fanfiction out there, from fluffy romance to epic adventures. Abuse is a very heavy and often uncomfortable topic. Only a small subset of fanfiction writers might be interested in exploring such a dark theme as abuse for the character Nico, so it's not likely to be widespread.
A mortal could also be a good love interest. Imagine Nico, who has been so involved in the world of gods and demigods, falling for a normal human. This mortal could be an artist or a scientist, someone who sees the world in a completely different way than Nico. Their relationship could be about Nico learning about the mortal world through this person's eyes and falling in love with both the person and the new perspective.
One great fanfiction could be about their adventure in an unknown magical realm. They might have to combine their unique powers - Jason's control over the winds, Nico's ability to summon the dead, and Percy's power over water to defeat a powerful dark force.