For Dark Percy, his character could be developed by showing the internal struggle between his dark side and his original self. Flashbacks to his normal self can be used to highlight the contrast. As for Zoe, her development can be centered around her growing trust in Dark Percy despite his changed state. She could start as a cautious observer and gradually become a fierce defender of him.
Dark Percy's character can be developed through his interactions with different characters. For example, when he meets an old enemy who mocks his current state, he can show a range of emotions from anger to self - doubt. Zoe can be developed by having her face difficult decisions regarding Percy. For instance, when she has to choose between following the orders of the gods who want to destroy Percy or standing by him.
To develop Dark Percy, explore his newfound powers that come with his dark state. Show how he struggles to control them at first and then gradually masters them. Zoe's character can be developed by exploring her past. Maybe she has a connection to Percy's dark state that she is unaware of. As they journey together, she uncovers this connection and it changes her perspective on Percy and herself.
Their relationship could start with mutual respect. Percy respects Zoe's skills and her loyalty to Artemis. Zoe, in turn, respects Percy's power and his courage. As they go on quests together, they start to rely on each other more and more, which deepens their bond.
Another way to develop their relationship is through moments of vulnerability. If Zoe gets injured during a battle, Percy could take care of her. This would show a different side of Percy to Zoe. Similarly, if Percy is having doubts about his role as a hero, Zoe could offer him advice and support. These exchanges would make their relationship more complex and interesting in the fanfiction.
For Percy, his 'dark' side could be explored by showing his internal struggles. Maybe he has dark powers that he's afraid of using. Thalia, on the other hand, can be developed by showing her determination to reach out to Percy. For example, she could be the one to constantly encourage him to embrace the good in himself.
Percy could be developed as a more brooding and conflicted character. His powers might be darker and less controlled, which makes him a danger to those around him, including Annabeth. Annabeth, on the other hand, could become more determined and a bit more ruthless in her attempts to save Percy from his dark self.
Their relationship could develop through shared experiences in Chaos's realm. For example, they could start off as reluctant allies, but as they face more and more difficult challenges together, they begin to trust and respect each other more. Eventually, they could become close friends who would die for each other.
For Percy, you could explore his insecurities more deeply. Maybe he's worried about living up to his reputation as a hero. With Emma, give her unique traits. For example, she could be really good at deciphering ancient languages. Then, put them in situations where they have to rely on each other. Like when they're trapped in an ancient maze.
In fanfiction, Percy and Hermione's characters can be developed in various ways. Some writers might explore Percy's sense of duty and how it interacts with Hermione's thirst for knowledge. For example, they could be on a mission together where Percy's strategic planning, which he learned from his time in the Ministry, combines with Hermione's research skills to solve a complex magical problem.
They could interact in a very competitive way too. Maybe they compete in different tasks or challenges within the story. For instance, if there's a race to find a magical item, they both want to be the one to succeed first, but still have a deep underlying sibling bond. Percy might tease Zoe sometimes in a brotherly way, and Zoe would roll her eyes at his antics but secretly be fond of him. Their interactions would be a mix of typical sibling banter and deep emotional support for each other.
Percy could be a brave and adventurous character, perhaps with some special abilities like being able to control water or having enhanced strength. Zoe might be a smart and resourceful female character, maybe with skills in tracking or archery. They could be from a fictional world full of magic and mythical creatures.
To develop Percy, you can focus on his loyalty. In a fanfiction with Hermione, this loyalty could be tested in new ways. For instance, when they are in a situation where they have to choose between their own worlds' interests. Hermione can be developed by highlighting her adaptability. She has to adapt to the new world of demigods, with its own rules and hierarchies. You can also show how their individual character traits affect their relationship. Percy's impulsiveness might sometimes clash with Hermione's careful planning, but they can also find a balance and grow together as characters.