The theme of mystery is likely present as well. Since it's a novel, there would probably be elements that the reader has to piece together. Maybe there are secrets about the hellish elements that are gradually revealed throughout the story, and the characters are on a journey to uncover the truth about what is really going on in this hell - inspired world.
Power and redemption are often main themes. The heroes in these novels usually have to struggle with their past mistakes and find a way to redeem themselves in the hellish environment, while also grappling with the power dynamics within that strange and often dangerous realm.
A common theme is the origin story. Many fanfictions explore how a vampire came to be from hell, whether it was a curse or some dark magic. Another is the theme of survival. Hell is a dangerous place, and vampires have to find ways to survive, whether it's by making deals with demons or finding new powers. There's also the theme of identity, as these vampires struggle to define who they are in the context of being from hell.
"Chaos: Me!" The Lord of the Underworld, Controlling the Demon God was a novel with the main character being the Lord of the Underworld. The story told the story of the protagonist crossing the Untainted Land, becoming Ancestor Minghe, awakening the Nether World System, getting engaged to Houtu at the beginning, establishing the Nether World with Houtu, and becoming the Lord of the Nether World. He could draw out the powerful cultivators who had died in the past from the chaos and confer them the title of employees of the underworld to receive rewards. This novel was full of thrilling plots, allowing the readers to fully experience the adventures and growth of the Lord of Hell.
One of the main characters is Inspector Frederick Abberline, who is involved in the investigation of the Jack the Ripper murders.
In the 'Returned from Hell Novel', there could be a main character who is the one that has come back from hell. This character may have some special qualities or powers as a result of their time there. There may also be side characters like friends or family members who have to deal with the changed person. And there could be an evil entity or a group that is somehow related to the character's time in hell, either as the cause of their going there or as something that wants to stop them from achieving their goals now that they are back.
Since the title is 'the man from hell novel', it's safe to assume that the main character is the man who has some connection to 'hell'. Maybe he's a person who has been through so many terrible things that he seems like he's from hell, or he could be a character with some supernatural origin related to hell. But without reading it, we can't be certain about his specific traits or his backstory.
The main themes are likely to include the brutality of war. It might show how soldiers and civilians endure great pain, suffering, and loss. Also, themes of heroism in the face of extreme danger could be present.
It's about three deranged killers. They escape from prison and continue their spree of violence and mayhem.
The main plot is about three deranged individuals and their heinous acts.
A theme that is often seen is the exploration of good and evil. Since the prince is from hell, there's always this question of whether he can be good or if he's doomed to be evil. Fan fictions may explore different aspects of his morality, like how his upbringing in hell affects his view of right and wrong, and how interactions with other characters, especially those from the 'good' side, can influence his moral compass.