Princess Unicorn is the prettiest princess in the whole world. Unfortunately for Susan Dillon, who hates wearing dresses and looking “girly;” She is called to take up the mantle of Princess Unicorn and “save the world from the forces of evil”, whatever that means. Susan is struggling with the normal hardships of being a teenager and doesn’t need to added stress of crime fighting on top of everything else. It also doesn’t help the Princess Unicorn is very outgoing and friendly, sometimes converting enemies into friends and gaining a whole following of fans in her wake.
Susan really hates what she becomes and will do anything to avoid the transformation, but outside forces conspire against her and she often has no choice but to transform and save the day once more. What a pain!