A 'historia visual novel' could be about various things. It might be a story set in a historical context, with characters and plots that unfold in a way typical of visual novels. It could focus on a particular era, like the Renaissance or the Victorian age, and tell a fictional story with elements of that time's culture, society, and events.
I'm sorry, I don't know the specific real story of Luis Andres Colmenares. There could be many people with this name. Maybe you can provide more context like where he is from or what field he is related to.
The main theme could be the concept of a 'perfect crime'. It might explore the idea of how someone tries to plan and execute a crime without leaving any evidence or getting caught.
I'm not sure exactly without reading the story, but it could be the criminal who is attempting the perfect crime and perhaps a detective or someone trying to solve the case.
Yes, there are quite a few. You can start by looking on fanfiction.net or Archive of Our Own. Some fanfictions might explore their relationship in an AU (alternate universe) setting, like a modern-day scenario where they meet and get married, while others could be more in line with the original story's themes and settings but with a different plot twist leading to their marriage.
There could be some, but it really depends on the market and the fan base. Since visual novels are a diverse genre, those with a historical focus might not always get the same level of mainstream attention. But in the communities dedicated to visual novels and historical fiction, there may be some well - known 'historia visual novel' titles that are highly regarded for their storytelling, art, and historical accuracy.