The main character is Carmen Sandiego. And there are also the characters who are trying to catch her, like the agents from the detective agency or police force.
In the original Carmen Sandiego story, the most prominent character is Carmen Sandiego herself. She is a complex character, being a highly intelligent and elusive thief. Then there are the 'good guys' who are constantly in pursuit of her. These could be international agents or local law enforcement officers. Each side has their own set of skills and motives. Carmen is motivated by the thrill of the steal and the allure of valuable items, while the pursuers are driven by the need to uphold the law and protect the world's treasures.
The main character, as we all know, is Carmen Sandiego. She is a very interesting character with her own motives and style. She travels around the world stealing precious things. On the other side, there are characters who represent the law enforcement. They are often shown as being very determined to catch Carmen. There might also be some side characters who help Carmen in her escapades, either knowingly or unknowingly. These characters together create the dynamic world of the original Carmen Sandiego story.