Robert "Rob" "the Master" McGroarty is a major character in all three of The Brave Little Toaster movies.
Rob is the Toaster and the other four appliances' rightful owner, and the primary reason of their search. Thinking he had abandoned them, they decide to find their Master themselves, passing through many dangers along the way. Meanwhile, Rob appears at his apartment in the city ready for Chris to take him to the cabin where he spent his childhood so Rob can pick up Toaster, Blanky, Lampy, Radio and Kirby to use at his dorm at college.
On their way to the cabin, Rob tells Chris that she's going to like the cottage and that it's a shame that his family has to sell it. When they get to the cabin, Rob and Chris go inside and find the place to be a complete mess (from the appliances' attempts to escape). Rob believes that someone came in and trashed the cottage, to which Chris replies, "You big dumbo! Didn't you lock the doors?" Even though Rob and Chris don't find the appliances, they manage to fix up the cottage for its future owners and leave to return to Rob's apartment. Later on back at Rob's apartment, his mother tells him that he can have some of her stuff to which Chris suggests that Rob should go for it, but Rob turns down his mother's offer.
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 then sacrifices himself to save him, and Rob takes the appliances home and fixes the mangled Toaster before taking 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.
- He was voiced by Wayne Kaatz in the first film and by Chris Young in both of the sequels. He resembles a teen version of John Darling.
- When he was young, he wore exactly the same shirt (orange and off-white stripes, short sleeve) as Phineas Flynn does.