The Master is the Toaster's and the appliances' rightful owner, and the primary reason of their search. Thinking he abandoned them, they decide to find their Master themselves, passing through many dangers along the way. Finally reaching his new apartment, the appliances discover that Rob replaced them, and are sent to a junkyard. The Master's black and white television broadcasts the Toaster's current location to him, and he departs to the location in the nick of time, only to be thrown in the Crusher's conveyor belt by The Giant Magnet. The Toaster sacrifices itself to save him, and Rob takes them home to fix the mangled Toaster and take them to college.
He has very strong sentimental value attached to the appliances, evidenced by the lengths to which he went to retrieve them. He was a sandwich kid and the appliances were his only friends, until his parents made him move and didn't let him take them with him.