The Magic School Bus: Keesha Franklin

Keesha is the more level-headed and realistic student in the class. She is most often the most sarcastic one as well. Because of her skepticism, she usually argues with Ralphie, who tends to live in his imagination. She's also shown to be ambitious, but unlike Janet, another ambitious character, she will stop her pursuit when she realizes she's either wrong or putting her friends in danger.