A plot for this fanfiction could be that Robin and Zoro keep the pregnancy a secret from the crew at first. But as time goes on, it becomes harder to hide. Meanwhile, they are also facing a new island with strange customs and threats that are related to Robin's pregnancy in some way. For example, the island has a law that pregnant women must perform a certain ritual, and if they don't, something bad will happen to the baby.
Perhaps in the fanfiction, Zoro and Robin find out about the pregnancy in a very unexpected way. They are on a mission, and Robin starts showing signs that are initially misdiagnosed. Once they realize she is pregnant, they have to deal with their own fears and insecurities. Zoro might worry about not being a good father, and Robin could be concerned about how her pregnancy will impact her role in the crew. The story could then be about them overcoming these doubts and facing the future together as a family.
One possible plot could be that they are on a new island during their adventures in One Piece. Since they are pregnant, the crew has to be extra cautious. Zoro might struggle with the idea of being a father as he has always been focused on his swordsmanship. He could start training in a new way to protect his future family. Robin, on the other hand, would use her knowledge to ensure a safe pregnancy. She might research about any potential threats to the babies from the various historical texts she has access to. The crew would also rally around them, with Sanji cooking special nutritious meals for the expecting parents.
A Zoro and Robin pregnant fanfiction might explore how their different personalities would handle the situation. Zoro, with his tough exterior but loyal heart, would be a strong support for Robin, who is intelligent and calm. The story could focus on how they balance their roles within the Straw Hat crew while also dealing with the impending arrival of their baby. It could also show how their relationship changes from being comrades to partners in a more domestic sense, with new challenges and joys along the way.
In this fanfiction, the pregnancy could be a result of a deep emotional bond that developed between Zoro and Robin over time. The crew might be initially shocked but then very supportive. The baby could become a symbol of a new beginning for the Straw Hats. There could be challenges like protecting the baby from other pirates or the World Government who might see the child as a threat due to its parents' reputations. Also, the baby could bring out a softer side of Zoro and Robin, and they could learn a lot about themselves as they become parents.
Character growth is a big part. Since they are both complex characters in the original. Fanfiction might show Zoro becoming more in tune with his emotions around Robin, and Robin becoming more confident in her physical abilities with Zoro's influence. Like in some stories where Zoro teaches Robin basic self - defense moves, and Robin in turn helps Zoro understand some ancient texts related to their adventures.
One possible plotline could be that they are in a dangerous situation together. Maybe they are trapped in an enemy's lair, and they think they might not make it out alive. In that moment of high tension and shared vulnerability, a kiss could happen as a way to express their unspoken feelings. Another plotline could be that Robin discovers a long - lost secret about Zoro's past that has a deep emotional connection to her own past. This revelation could lead to a moment of intense closeness and end with a kiss.
In the fanfiction, the baby could have some unique abilities inherited from both Zoro and Robin. For example, it could have Zoro's sense of direction in combat and Robin's ability to read ancient texts. This could lead to many interesting adventures as the crew tries to understand and help the baby develop these powers.
One idea could be that during a dangerous adventure, Zoro and Robin get separated from the crew in a mysterious island. There, they have to rely on each other for survival. As they face various challenges together, their bond deepens and a romantic relationship starts to form, filled with their unique personalities interacting. For example, Zoro's tough and straightforward nature combined with Robin's calm and intelligent demeanor.
Blackbeard could be a great villain. He might see the baby as a threat in the future or want to use its powers for his own evil plans. He could send his crew to kidnap the baby, leading to an all - out battle between the Straw Hats and Blackbeard's crew.
One common theme is mutual respect. Zoro respects Robin's intelligence and her ability to handle difficult situations, and Robin respects Zoro's strength and loyalty. For example, in many fanfictions, they rely on each other's skills during battles or when solving mysteries on the ship.
One common theme is the development of their friendship. Since they are both important members of the Straw Hat crew, fanfictions often explore how they become closer and trust each other more over time.