In fanfiction, the author might create Luke's possessiveness towards Percy to add drama. Their relationship can be a complex one. Maybe Luke has some past issues that make him act this way towards Percy. For example, if he had a bad experience related to someone like Percy in the past, he could be projecting that onto Percy. This possessiveness then becomes a driving force for many of the interactions and conflicts between them.
Well, in some fanfictions, Luke might be possessive of Percy because he sees Percy as a symbol of power or potential. He may want to control Percy to use his abilities for his own goals, like in the original story where Luke has his own dark motives. Also, it could be out of envy. Percy has things that Luke might feel he lacks, so his possessiveness could be a way to try and take what Percy has for himself.
In fanfiction, the concept of Ares being possessive of Percy can also stem from the idea of forbidden or complex relationships. The contrast between Percy's more heroic and noble nature and Ares' war - like and often brutish ways creates an interesting dynamic. Ares may view Percy as a symbol of what he can't be, and his possessiveness could be a way of trying to corrupt or change Percy to fit his own view of the world.
It could also be due to a sense of ownership. Percy has achieved a lot with the help of the gods, and Athena might feel that she has some claim over him because of the assistance she or other gods associated with her have provided. In the context of the fanfiction, this sense of ownership could translate into possessiveness.
Well, in some fanfictions, Hermes might be possessive of Percy because Percy could possess certain qualities or powers that Hermes wants to control or have an influence over. Maybe Percy has a unique connection to the world of the gods that Hermes sees as valuable.
It could be because of the potential for a romantic relationship in fanfiction. Some fans like to explore the idea of Nico having romantic feelings for Percy. In that case, possessiveness might be a natural part of showing his intense emotions. He wants Percy all to himself, not sharing him with others, especially when there are other characters who might also be interested in Percy.
It could be that Aphrodite senses some unique potential in Percy when it comes to love. Maybe she foresees that he will play a crucial role in some grand love - related event in the future. So, to ensure that things go according to her plans, she becomes possessive. She doesn't want other forces or characters to sway Percy from the path she has in mind for him.
It could be that Zoe has a special connection with Percy that she doesn't want anyone to interfere with. So she becomes possessive to safeguard that connection.
In Percabeth fanfiction, Luke's jealousy of Percy can be quite complex. Firstly, Percy has a certain 'it' factor. He's brave, but also has a sense of humor and is able to make friends easily. This makes him popular among the demigods. Luke, who has his own insecurities and a different path in life, sees Percy as someone who has it all. Percy's relationship with Annabeth is a big part of it too. Annabeth is smart, strong, and beautiful. Luke may have desired her for himself at some point. And seeing Percy with her, having her love and support, could really fuel his jealousy. Additionally, Percy seems to have a better relationship with the gods, which gives him more opportunities and power, and this is something Luke may deeply envy.
Percy might love fanfiction because it offers new and exciting adventures that are different from his own but still related to his world. It gives him a chance to see different interpretations of his friends, himself, and the events he's been through.
In some fanfics, Zeus might be possessive of Percy because Percy represents a powerful force or potential. Zeus, being the king of the gods, wants to control all sources of power. Percy's abilities and his role in the demigod world could make Zeus see him as something to be owned or at least controlled.
At first, it could be quite rocky if they find out later in the story. Percy might be angry that Luke has been keeping secrets or has done bad things in the past. But eventually, they would likely grow closer as they realize they are family and start to support each other.