Sarah is a vengeful spirit who was accidentally murdered by her friends and had her death covered up for thirty years, during which she spent her time confined to relieving the memories of being murdered over and over in complete agony. Filled with rage, now called Needlem0use, she took form of the mascot of the company whose building was built over her body, Sonic the Hedgehog, and began hunting down her friends using the disk she was stuck in.