I don't have information about the specific main characters in this novel. However, it's likely that the male lead who brings his secret lover back from the dead is one of the main characters, and of course, his secret lover herself.
Since it's a story about bringing a secret lover back from the dead, the main characters would be the person with the power or determination to do so, probably a male protagonist. And then, the resurrected secret lover. There may also be some supporting characters like friends or family members of the male lead who either help or oppose his actions regarding the resurrection.
Without having read the novel, it's hard to say for sure. But the main characters are most likely the male character who is responsible for the lover's return from the dead. He must be a complex character, driven by his love for her. And the female character, the secret lover, who has now come back to life. There could also be antagonists in the story, perhaps people who think that what the male lead has done is against nature or some sort of law in the world of the novel, and these could also be considered important characters in terms of driving the plot forward.
I'm not sure about the exact plot as I haven't read this novel specifically. But generally, it might involve a story where the male lead brings his secret lover back from the dead. Maybe there are elements of mystery, love, and perhaps some challenges they have to face together in their new - found situation.
I'm not sure as I haven't read the novel. But usually in a love - centered novel, there would be the two lovers as main characters. Maybe a male and a female lead.
Since I haven't read the 'his secret lover novel', I'm not sure about its main theme. It could be about love, given the title mentions a 'secret lover'.
There might be some mentors or guides from the xianxia world who still have an influence on the protagonist even after they have returned. These characters could be important in helping the protagonist navigate their new situation in the normal world.
In the 'Returning from the Immortal World' novel, the main character is likely to be the one who makes the journey back from the immortal realm. There could be other important characters like friends or family members in the mortal world who are affected by the protagonist's return. There might also be antagonists, perhaps from the immortal world who don't want the protagonist to succeed in the mortal world or who are trying to bring them back to the immortal world against their will.
There are also the girl's family members, like her mother and brothers. Her mother's struggle with poverty and her brother's problems contribute to the overall atmosphere of the story and the girl's own experiences.
Based on the title, the main characters are likely the warrior, the hero, and the hero's lover.
Well, from what I've heard about this type of web novel, the main character is often a unique individual. He or she may have special powers or abilities gained from the immortal world. There could be antagonists too, perhaps those who envy the main character's powers or those who want to stop the main character from achieving certain goals. And then there are likely to be other characters that form the social fabric of the mortal world that the main character has to interact with upon returning.
The obvious main characters would be the liar and his lover. The liar could be a charming but troubled young man, perhaps an artist who lies about his past to seem more interesting. His lover could be a kind - hearted girl, a student or a young professional, who is initially drawn to his charm. There could also be a best friend character who suspects the liar's true nature and tries to warn the lover.
I'm not sure exactly as I haven't read the novel, but it's likely that there are two main lovers. One who writes the last letter and the other who receives it.