Fan Casting Soapbox Sadie in Sort by Tropes

A character, often a child or teenager and almost Always Female, who cares deeply about all worthy causes. She wants to protect the environment from polluters, prove that women aren't inferior to men, and Free the Frogs. If she's the main character of the show, she spends a lot of time struggling with her idealism and whether it is too unrealistic. Soap Box Sadie is usually a post-hippie, the type of girl who would have been a hippie had she not been born in the wrong decade. Sometimes she's updated to the more recent counter-cultures of the time like emos, goths, hipsters, etc.