They could be united by a common enemy that is not related to the main plot of One Piece. Maybe an ancient power or a group of pirates from a far - off land that threatens both the Amazon Lily and the Straw Hats. Working together against this new threat would make their relationship deeper as they rely on each other's strengths. For instance, Hancock's knowledge of the sea around her island and Luffy's fearless combat style would be a great combination.
Firstly, it should start with mutual respect. Given Luffy's nature, Fem Luffy would respect Hancock's position as the empress of Amazon Lily. Hancock, on the other hand, would respect Fem Luffy's strength and determination. For example, in a battle situation, they could see each other's abilities up close.
Well, it could start with small gestures. For example, Luffy might share his food with Boa Hancock, which is a big deal for him. This simple act could make Boa Hancock see his kindness in a new way. Then, as they interact more, they might have some accidental physical contact like brushing hands. These little things can build up the tension and start to develop their relationship.
If they had a baby, Hancock would become more protective not just of Luffy but also of their child. Luffy would have a new sense of responsibility. He might not be as reckless as before, at least when it comes to the safety of his family. Their relationship would deepen as they share the joys and concerns of raising a child in the dangerous world of One Piece.
In a fanfiction, their relationship might develop when Luffy gets injured and Hancock has to take care of him. This would be a new situation for Hancock as she is usually the one being protected. Luffy, in his injured state, would still be his positive self. Hancock would see his vulnerability and also his unwavering spirit. This could lead to a deeper emotional connection between them, with Hancock realizing she wants to be by his side not just because of her love for him, but also because she admires his character.
They could have heart - to - heart conversations. For example, Shanks could share his past adventures and the lessons he learned from them with Luffy. This would help Luffy gain more wisdom and also deepen their connection.
One great fanfic could be 'Luffy and Hancock's Grand Adventure'. It might explore their relationship in a new and exciting way, perhaps with them going on a quest together that deepens their bond. Another could be 'Luffy's Surprise Encounter with Hancock' which could focus on a chance meeting that changes their dynamic.
Their relationship would likely become more protective. Luffy would start to be more aware of Hancock's well - being, not just in battles but in general. And Hancock would be more open and vulnerable with Luffy, relying on him more as she's carrying their child.
One idea could be that Hancock's feelings for Luffy lead her to secretly help the Straw Hats in a dangerous situation. For example, when they are facing a powerful enemy on an island, Hancock uses her influence and powers to divert the enemy's attention.
Their relationship can be developed through shared adventures. For example, when facing a really tough enemy, Luffy's determination to protect Robin and Robin's trust in Luffy's strength can bring them closer. Each time Luffy saves Robin from danger, it deepens her respect and loyalty to him.
If Luffy and Hancock were married in fanfiction, their married life would be a blend of two very different worlds. Luffy's world is full of his crewmates, adventures, and the search for One Piece. Hancock's world is the Kuja tribe and her position as Empress. In their married life, Luffy would likely introduce Hancock to his friends like Zoro and Nami. Hancock would have to get used to the rowdy and free - spirited nature of the Straw Hat crew. At the same time, Luffy would have to respect Hancock's status in Amazon Lily. There would be challenges, but also a lot of love and laughter. Maybe they would have a home on an island that's a mix of Amazon Lily and the Straw Hat's style, where they can both be happy.