Cinderella embodies the concept of Depravity, signifying moral corruption, within the Library as a supernatural entity linked to this abstraction. While defined by Depravity, she isn't wholly confined by it, occasionally exhibiting unexpectedly wholesome traits. Pink consistently marks her visual identity, manifesting in her lifeforce and weaponry. Her history traces a path from victimhood to empowerment. After enduring profound misery, a fairy's intervention granted her strength and power. This liberation awakened a ruthless nature; she embraced violence against her former tormentors, viewing ugliness as a scourge to eradicate. She openly scorns purity, declaring those claiming to be "unsullied" as the most internally corrupt. Her motivations surpass vengeance, aiming to dominate and impose stillness upon the world itself. She manifests a deeply cynical and aggressive personality. Her purification monologues brim with contempt, dismissing others' lives as meaningless and relishing inflicted pain. Phrases like "Ugh. Look at these idiots," "Tell me...how much does it hurt?" and "You ugly shits! You're worse than scum!" exemplify her disdain and brutality. She mocks adversaries for lacking a fairy godmother or challenges them to wear glass slitters, weaponizing her tale's elements. Primarily focused on her own amusement—stating "The only thing that matters is that I'm having fun"—and rejecting concern for others, she pragmatically exploits any resource, including entities called "Them," to achieve her ends. Her narrative unfolds across Library acts. In the Act of Fusion, she actively wields power and weapons to slaughter detractors and seize control. This culminates in the Act of Elimination, where she confronts her Reality counterpart—a version from a survival-of-the-fittest world who secured a castle. Their confrontation, "Depravity and Depravity" sharing a stage of ash and death, results in a violent clash of murderous intent, leaving glass slippers stained with blood. Despite her association with Depravity and vicious methods, she operates within the Library's broader rules. She participates in the collective mission to gather lifeforce for reviving authors, necessitating combat against Nightmares and other versions. While capable of extreme cruelty, she adheres to boundaries observed among Library inhabitants, like avoiding involving unrelated individuals when possible and displaying moments aligning with the group's occasional wholesomeness during events. Her journey reflects the tragic erosion of self common to Library characters, as they increasingly become distilled embodiments of their core concepts while pursuing ultimately doomed objectives.