Cassidy is a character from the Black Carnival series.
Cassidy is a mechanic and ride designer. She is a part time head of Atlasland, the amusement park in the Black Carnival. Atlasland is divided into two sections, rides and games. Cassidy is in charge of the rides section, while her twin sister Cameron is in charge of the games section. The two have an ‘unrivaled rivalry’ that nearly tore down Atlasland as a whole. On the dying wish of Atlasland’s previous head, Atlas, he wished the two sisters could get along and make Atlasland the section with the most traffic. The two sisters compromised and now take turns each year being a singular head throughout the year. Their rivalry has forced them to create a better amusement park and has only done Atlasland good. Cassidy has always had the engineering mind, able to bring Cameron’s wondrous and creative ideas to life.
Though the two loathe the other, they both realize how much they need each other in memoriam of their former boss Atlas.