Roz stands as the final survivor of the Gnome People, who championed coexistence with the Earless—mysterious entities threatening humanity. Roughly a decade before the series, her people suffered transformation into Earless during their peace efforts, an event that altered them physically and existentially, leaving Roz alone.

She bears an artifact called the "Crazy Diamond," crafted by her father after he himself became an Earless. This device emits frequencies that attract Earless, binding Roz's personal history to the wider conflict between humans and Earless. The Crazy Diamond serves as a symbolic link to her past and the loss of her community.

During her journey, Roz encounters protagonists Echo and μ (Mu). She accepts their help, especially concerning challenges tied to her father's fate and the Gnome legacy. This occurs amidst the crumbling of "The Wall," a structure symbolizing physical and ideological barriers. The collapse highlights themes of exposure and unresolved trauma, reflecting Roz's ongoing struggle with identity and history.

Roz's background ties into the lore of the Earless and the consequences of Project Freedom, a pivotal conflict involving the legendary Player Jimi Stonefree. Her existence underscores the tensions between humans and Earless, along with the personal cost of advocating for coexistence in a divided world.