Coffee Maker, more commonly known as Maker (メーカー Mēkā), is a robot appliance featured in episode thirteen, Even a Vacuum Cleaner Can Love, Baby. QT first met her after going into a coffee shop with Dandy and subsequently became QT's love interest.
After her and Register's dump to Dream Island, Register and Toaster decided to revolt against the city for throwing them away like garbage. It was with this that QT discovered that Maker was actually in love with Register and not himself.
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.