Cash Register, more commonly known as Register (レジスター Rejisutā), is a robot machine featured in episode thirteen, Even a Vacuum Cleaner Can Love, Baby. True to his name, he worked as a cash register at a coffee shop with Maker and Mill until he and Maker were taken to Dream Island due to developing feelings for one another and hindering their jobs.

Harboring anger and hatred toward the living beings that threw them away, Register and Toaster started a revolution. Unable to stand to see Maker cry over the possible death of Register due to the revolution, QT took it upon himself to end the revolt and save Register.

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