Strength and intelligence also contribute. A villain who can match the hero in power and wits is more engaging. Like Hannibal Lecter in 'The Silence of the Lambs'. He is highly intelligent and extremely dangerous, making him a memorable villain.
Well, for me, a great villain in fiction has to be really menacing. Like Darth Vader in 'Star Wars'. His deep voice, his black suit, and his powerful Force abilities make him look super scary. And he has a clear goal of ruling the galaxy.
One factor is their power. A villain who is extremely powerful, such as Lord Voldemort with his dark magic, is more likely to be famous. Their relationship with the hero is crucial too. The antagonistic relationship between Sherlock Holmes and Moriarty makes Moriarty well - known. Additionally, a villain's backstory can contribute. If it's tragic or complex, like Maleficent's, it can make them stand out. People are interested in understanding why a villain became who they are. Also, their influence on the story world is important. If they change the course of events significantly, like Sauron in The Lord of the Rings, they'll be remembered.
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.
Often, a useless villain in a manhwa has weak powers or skills. Maybe they make poor decisions or are just there for comic relief and don't pose a real threat to the main characters.
Well, a great villain is complex. They might have redeeming qualities or a tragic backstory that makes you understand them, even if you don't agree with their actions. Also, they should be a worthy opponent for the protagonist, constantly pushing them to grow and develop.
In a great 'the villain origin story', the character's background plays a crucial role. It might be that they grew up in a harsh environment, such as a crime - ridden neighborhood. This could have made them cynical about the world. Another aspect is the influence of other characters. A mentor figure who was actually evil might have guided them astray. For instance, in the case of some villains, they were brainwashed by a more powerful and malevolent entity, which set them on the path to villainy.