CV: Kevin K. Gomez
Age: about 17 in human years
Sexuality: "Love is stupid!"
Heart Jewel: Fire Opal
Likes: Doing what he wants, being free, messing with people, power
Dislikes: When people are laughing and having fun
Opal is the first nightmare agent to arrive on earth. Opal doesn't see the point in friendship and love, and would rather ruin everyone's fun. He’s cruel and enjoys messing with people. His monsters tend to be unpredictable and difficult for him to control, but they are very strong.
Since he's so young and is rarely taken seriously, he's often tasked as the Agency's "Errand Boy".