They could start by respecting each other's skills. Robin admires Wonder Woman's strength and she respects his intelligence. They could have shared training sessions where they exchange tips and grow closer. For example, Robin teaches Wonder Woman some new ways to analyze battle strategies quickly.
Their relationship can be developed through shared experiences. For example, going through a tough battle side by side where they both have to save each other's lives. This would create a bond of trust between them.
Their relationship can be developed through shared secrets. For instance, they could both discover something about the League that they're not supposed to know. Keeping this secret between them would bring them closer.
Their relationship can be developed through shared challenges. For example, when they are stuck in a difficult situation like being trapped in an enemy's lair. They have to communicate, trust each other, and use their combined skills to escape. This would strengthen their bond.
Another way is through shared experiences. Let's say they both get caught in a time - travel anomaly. They have to rely on each other to find their way back to their own time. During this adventure, they learn about each other's fears, hopes, and dreams. This shared experience could be the catalyst for a deeper connection between them, whether it's a friendship based on mutual understanding or a more complex relationship.
Another way is by introducing a third party that threatens their relationship. For example, a new hero comes in who tries to take Robin under their wing. Nightwing then has to prove why he is the better mentor. This would create some drama and further develop their relationship as they work through this new situation.
Their relationship could start with friendly banter. They tease each other during team meetings or training sessions. This light - hearted interaction can gradually turn into a deeper friendship as they start to rely on each other more during missions.
One great fanfiction could be about Robin and Girl Wonder teaming up for a secret mission. Maybe they have to infiltrate an enemy base. The story could focus on their growing trust and friendship as they face various challenges together.
You could also develop their relationship through personal growth. Suppose Superboy is learning about his Kryptonian heritage and Wonder Girl is training to be a better leader. They can support each other in these individual quests. Wonder Girl could help Superboy understand the values of his heritage, and in return, Superboy can give her advice on leadership based on his own experiences. This mutual support would deepen their relationship.
In fanfiction, Wonder Girl can be developed through her interactions with new characters. For instance, if she meets a magic - using character, she could learn about different forms of power and how to incorporate them into her own combat techniques. This would expand her abilities and show her adaptability.
One idea could be that Robin and Wonder Woman team up for a special mission in a hidden, ancient temple. They have to solve puzzles that require both Robin's detective skills and Wonder Woman's knowledge of ancient lore. Another could be a story where Robin gets injured during a battle and Wonder Woman takes it upon herself to train him in new combat techniques to make him stronger.