Chaotic Evil, an alignment most notably characterized by the Joker. But, that is a bit cliche in my eyes, the laughing maniac running around killing everything because they think it would be fun. There is a way to work with a “Chaotic Evil” character in writing and especially in fantasy.
A character can play the long game and appear to everyone around them that they are working for the greater good but in private they are working just for themselves or for something a bit more sinister like a demon or some evil god. All of the good things that they are doing could be for a very nefarious purpose. How can this be written though?
Think of the novel as more a game and work in the biggest picture possible. And, foreshadowing is going to be your friend. In a project I am working on my character does not know that what he is doing is evil. He is mostly doing what he does for the money and personal gain. That is one way to do it or the character can know exactly what they are doing, like Cersei Lannister in early Game of Thrones. This allows the character to be more manipulative than a puppet working for a dark shadowy master.
While I am working on the former my favorite to read and to play as a character. These characters are smart and clever and always know more than they let on in their interactions with other characters. But, my question to all of you: What is your favorite type of secretly evil character to write, read, or even play? I am very curious to know what other writers and readers think so please let me know.