What makes a main character that is a villain in manga interesting?

A great villain in manga often has a compelling backstory that explains their motivations. They're also smart and strategic, not just brute force.

I recommend the novel "Comic Series: Starting with the Undead King" to you. The main character was sent to a strange world and was locked in the cage of the goblin tribe. After escaping, he thought that he was the main character of this world. In the end, he found out that the real main character was the Bone King who fought with the air. This book was a light novel, a derivative doujinshi novel. I hope you like this fairy's recommendation. Muah ~😗

A beloved villain in a BL manga often has a complex personality. They might have a tragic backstory or hidden vulnerabilities that make readers sympathize with them despite their villainous actions.

It could be that the villain has no clear goals or motives, making their actions seem random and ineffective.

Often, it's their backstory and the reasons behind their actions. A well-crafted villain has a past that explains their behavior and can even evoke sympathy from readers. Also, their unique powers or skills and the way they challenge the heroes add to their appeal.

The unique plot and complex characters make it stand out. The villain's motives and the challenges faced by the heroes create a thrilling story.

A character can be the villain if they have immoral or unethical motives. For example, if they want to steal, kill, or deceive just for their own gain.

The unique motives of the villain can make an 'original villain story' interesting. For example, a villain who is not just after power or money but has a complex psychological reason for their actions, like seeking revenge for a past injustice that was misinterpreted by society.

I recommend "Comic Series: Starting with the King of the Undead" to you. This is a light novel by author Yu Wu Ming, a derivative doujinshi novel. In this novel, after the protagonist transmigrated to a strange world, he thought that he would become the protagonist of this world. However, he discovered that the real protagonist was the Bone King who fought with the air, and he became the villain. I hope you like this novel. Muah ~

The virtue in a villain makes them unique. It could be their sense of justice in a twisted way or their complex motives that aren't purely evil.