Well, in some fanfictions, it might be related to his demigod powers. Since he has a connection to the water element, blood being a liquid could potentially be manipulated in a way similar to how he controls water. Maybe he can sense the water content in blood and use his will to move or influence it.
Some fanfictions might suggest that Percy's control over blood is a new power he discovers while on a special quest. He might find out that his powers are not just limited to water bodies but can also extend to the fluids within living beings. He could start to experiment with this new - found ability, and at first, it might be a bit clumsy. But as he gets more practice, he could use it for various things, like healing (by manipulating the blood's flow to injured areas) or even in combat (by making an opponent's blood act in a way that disables them, like making it rush to their head and cause dizziness).
One implication could be in the area of healing. If Percy can control blood, he could potentially direct it to areas of the body that need repair. For example, if someone has a cut, he could make the blood clot faster by controlling its flow and the platelets within it. This would make him a very valuable asset in any medical emergency within the world of the fanfiction.
One implication could be in combat. He could potentially use the blood of his enemies against them. For example, if an opponent is bleeding, he could make the blood blind them or make their movements sluggish by interfering with the normal blood flow.
Well, a major theme is the adaptation to new environments. When characters from Percy Jackson enter the True Blood world or vice versa, they have to adapt to the new rules, cultures and threats. There's also the theme of loyalty. Characters may have to choose between their loyalty to their original group (like the demigods in Percy Jackson) and their newfound allies in the True Blood world. This creates a lot of internal conflict and interesting storylines as they struggle to make the right decisions.
Well, in the world of fanfiction, anything can happen. Regarding Percy Jackson dying in Blood of Olympus fanfiction, there are many fanfictions out there with all kinds of scenarios. Some writers might kill off Percy to explore themes like sacrifice, the impact on other characters, or to create a really dark and dramatic storyline. However, the original series doesn't have this happen, so it's all about the creativity of the fanfic authors.
Perhaps he has been exposed to some sort of deadly and unknown substance in the mythical world. This could be a new type of monster venom or a strange plant that he accidentally ingested. The substance could be attacking his body from the inside, causing his internal organs to bleed, and thus he throws up blood.
Yes. A lot of the fanfictions are really creative. There are those that might give Percy new powers or put him in situations where he has to use his existing powers in unique ways. For example, he could be in a situation where he has to use his water - controlling ability to save an entire underwater civilization that isn't part of the original stories. These fanfictions can be really exciting to read.
One possible reason could be to create a tragic story. Writers might want to show how the world of the story would be affected by the loss of such a central character like Percy.
No. Percy Jackson is an original fictional series. Although it uses Greek mythology as its base, it has created a completely new world, characters, and storylines. Fanfiction usually implies building upon an existing work in a more derivative way, often by fans rather than the original creator. 'Percy Jackson' was created by Rick Riordan as an original concept.