It's important to remember that a simple exchange like the one you described doesn't provide enough context or information to definitively label someone as "evil." People often use playful or dramatic language when discussing hypothetical scenarios, such as playing the villain in a movie or show. Saying "my dream" in response to that question doesn't necessarily imply that the person is genuinely evil or harbors malicious intentions in real life.
The concept of good and evil is complex and subjective, and it's not appropriate to judge someone solely based on a light-hearted response to a hypothetical question. People may have different interests, preferences, and senses of humor, and their responses can vary accordingly.
If you are concerned about someone's behavior or character, it's best to look at their actions and overall behavior in a broader context, considering how they treat others, their values, and their impact on the people around them. If you have genuine concerns about someone's intentions or actions, it's essential to communicate openly and honestly with them, or seek advice from trusted friends or family members.
Remember, making hasty judgments about someone's character without a comprehensive understanding of who they are can lead to misunderstandings and unnecessary conflicts. Give people the benefit of the doubt, and focus on fostering open communication and understanding in your relationships.