It's hard to say for certain. Sometimes stories like 'La Esclava Blanca' combine real-life elements with fictional creations to make an engaging narrative. You'd have to do some research to know for sure.
Since I don't know the exact story, it could potentially be about a figure who met a watery end and was considered beautiful in a way that defies normal expectations. It could be a story about love and loss, where the person who drowned was remembered in a special way that made them seem the most beautiful. It might also be a story with a moral or lesson, perhaps about the transience of life and the power of memory.
The main character is probably Father Amaro. There could also be characters such as the people in the community he serves. Maybe there are other religious figures or local townspeople who interact with him and play important roles in the development of the plot related to the crime in the novel.
One possible main theme is the power dynamics and corruption. In this novel, it might show how power within the church or society can be misused, leading to various crimes and moral downfalls. This exploration of power and its abuse could be a significant aspect of the overall theme.
I'm not sure specifically which 'Al Hada Hada' book you're referring to. There could be a variety of stories depending on the genre of the book. It might contain adventure stories, tales of friendship, or perhaps fables.