Purato Soyogi is one of three sisters in the Soyogi family, alongside Socra and Alice. She possesses the ability to transform into a magical warrior, uniting with her sisters to confront antagonists from the organization Black.inc. This power enables her to battle threats posed by Black.inc.

Purato and her sisters encounter a mysterious cat that presents them with a specific wish. They work collectively to fulfill this wish while also facing a looming entity known as the "big shadow."

In the OVA, Purato is present when the sisters find this mysterious cat on the street, an encounter interrupted by an attack from a Black.inc member.

Purato also appears with her sisters in supplementary online content, seated at a computer discussing various topics, offering insights into their interactions.