Sure is. Mysterio in the comics is known for being villainous. His powers of illusion are often employed for nefarious purposes and to oppose the forces of good.
I haven't read this novel specifically. But generally, a 'villainous husband' in a novel might be a character with complex traits. He could start off seeming bad but then have a character arc where he shows redeeming qualities or there could be a deep love story behind his so - called villainous behavior.
Since I haven't read it, I'm not sure. But it might have a villainous husband as one of the main characters, and probably a female lead who is somehow connected to him, maybe his wife.
The use of multiple perspectives can also make the story in a 'villainous visual novel' engaging. By showing the events from the villain's point of view as well as the other characters', it adds depth. For example, we might see that the villain believes they are doing the right thing in their own world - view. This can create empathy for the villain in some cases, and at the same time, make the overall story more complex and interesting. Additionally, the setting and atmosphere of the visual novel can enhance the engagement. A dark, mysterious setting for a 'villainous visual novel' can set the mood and draw the reader or player further into the story.
One popular 'villainous visual novel' is 'Danganronpa'. It has complex characters, many of whom have villainous traits. The plot is full of twists and turns, making it an engaging visual novel experience.
The main character is obviously the one who adopts the villainous dad. This character is often portrayed as kind - hearted and brave, willing to take on the challenge of having a villainous figure as a family member.
Another possible plot is that the main character discovers some secrets about the villainous dad's past that led him to be the way he is. This could lead to a journey of understanding and forgiveness, and also put the main character in difficult moral dilemmas as they try to balance their loyalty to their adopted dad with what is right and wrong.
Well, one challenge could be facing the hatred of the other characters. Since you're the villainous empress, most of the good guys would be against you, making it tough to have allies. Another is dealing with the moral implications of your actions. Even if it's in a novel world, you might struggle with the evil deeds you're supposed to do.
A common 'villainous crossover fanfic' idea is to have the main villains from different fantasy series cross paths. For instance, Sauron from 'The Lord of the Rings' and Voldemort from 'Harry Potter'. They could exchange knowledge of dark magic and try to conquer both their respective worlds. Or, in a more comical vein, villains from animated shows such as Plankton from 'SpongeBob SquarePants' and Mojo Jojo from 'The Powerpuff Girls' could cross over. Plankton might try to steal Mojo Jojo's inventions to finally take over the Krusty Krab.