Rinne's mother gave her a notebook decorated with a charming bear motif, which Rinne deliberately abandoned out of embarrassment. After Rinne suffered an accident while hurrying to retrieve it, her mother's absence anchored Rinne emotionally during her hellish confinement. Rinne's profound longing to reunite with her mother—whom she cherished beyond life itself—fueled her endurance and hope through the ordeal. This maternal connection remained her strongest tie to the world of the living. The character has blue hair and blue eyes.