Agatha is usually seen as a villain in the comics. Her powers are often used for nefarious purposes, and she poses a significant threat to the protagonists. But comic interpretations can vary, and some versions might present her in a more complex or sympathetic light.
It depends on how you look at it. Wanda's character has gone through various developments and sometimes her actions could be seen as morally ambiguous rather than purely villainous.
Definitely. Mysterio is a villain in the comics. He often uses his special effects and mind tricks to outwit heroes and cause trouble. His motives are usually self-serving and malicious.