By showing them having heart - to - heart conversations. For example, Percy could share his fears about his powers with Thalia, and she could offer her own experiences and advice.
One idea could be Percy and Thalia teaming up against a powerful new enemy that neither could face alone. Their combined powers and sibling bond make them a formidable force.
He could start off as a rival to Percy. Maybe they both have their eyes on the same girl or they are competing for leadership in a demigod mission. But then as they get to know each other better, they become friends and respect each other's abilities.
One popular plotline is them teaming up against a common enemy. For example, a powerful new monster that threatens their friends and family. They use their combined skills, Percy's water - related powers and Thalia's lightning abilities, to fight it off.
There could be many interesting aspects in such fanfiction. Maybe Thalia's love for Percy is a slow - burn kind of thing. It might start with her having a begrudging respect for him which gradually turns into deeper feelings as they face challenges together. For example, during a dangerous quest, Percy's bravery and selflessness could make Thalia see him in a new light.
Thalia might show her possessiveness by constantly trying to keep Percy to herself. For example, she could be overly protective when other characters get too close to Percy. She may insert herself into conversations or situations where Percy is involved, even when it's not really necessary.
Well, she might constantly be by Percy's side during dangerous situations, like when they are facing monsters. She could also be very cautious about who Percy interacts with, fearing they might harm him.
Well, their bond could be full of action. They might be constantly in danger, and their combined skills would be crucial for survival. Percy's ability to control water, Thalia's lightning powers, and Nico's control over the dead would make them a force to be reckoned with.
One great 'Percy Thalia Fanfiction' is 'The Bond of Olympus'. It delves deep into their relationship as demigods. It shows how their different personalities, Percy's loyalty and Thalia's fierce protectiveness, interact in various adventures. They face challenges together and their bond grows stronger throughout the story.