Usagi served as a template for shoujo protagonists for years, and while the series didn't create magical girl anime, it certainly popularized it.
Sailor Moon follows the story of Usagi Tsukino, a young schoolgirl who suddenly gains the ability to transform into a superhero alter ego — Sailor Moon. With the help of her fellow Sailor Soldiers, the group embarks on a quest to defeat the forces of an evil entity known as the Dark Kingdom. These days, it's difficult to watch Sailor Moon and not see how transformative it was for the medium. Usagi served as a template for shoujo protagonists for years, and while the series didn't create magical girl anime, it certainly popularized it.