Well, in such a fanfiction, there could be various hints. Maybe Zoro's behavior might be more in line with typical female characteristics described in that specific fictional world, like being more empathetic or having different social interactions compared to the original male - character version. But it really depends on how the author has crafted the story.
I'm not sure specifically what the 'ik sandhu hunda si' real story is. It could be a very specific story within a particular community, culture or family. Maybe it's a personal anecdote or a local legend that requires more context to be fully explained.
Zoro.to might have manga, but it's often associated with copyright infringement and potential security risks. It's better to use legitimate platforms for reading manga.
The phrase 'ik sandhu hunda si based on true story' is rather mysterious without additional details. However, it could be a story about a person named Sandhu. Since it's based on a true story, perhaps Sandhu had an extraordinary experience. It could be a story of his achievements, like he overcame great difficulties in his life. Or it could be a story related to his relationships, for example, how he helped his community or family through a tough time. Maybe it's a story that has been told among his descendants or within a certain ethnic group to inspire others or just to preserve their history.
One great fanfiction could be about their adventures on a new island not shown in the original story. Maybe they encounter a powerful and strange new enemy. Luffy's determination, Zoro's strength, and Sanji's culinary skills all come into play in this new situation.
There are fanfics that put Zoro in alternate universes. For instance, an AU where all the Straw Hats are in a modern - day setting. Zoro could be a martial arts instructor or something similar. In some fanfics, Zoro is given new powers or abilities, like the ability to sense danger from afar. This can lead to really exciting storylines as he uses these new skills to protect the crew and achieve his goals. And of course, there are those heart - warming fanfics where Zoro shows his softer side towards the other Straw Hats, especially when they are in trouble.