Maddy's adopted uncle and owner of the Pit Stop
Tinker ran Tinker’s Pit Stop in Paradise, Michigan – a repair shop. He also took Maddy in after her parents died and was her legal guardian for the few short years it took for her to reach 18. By then, he was the crusty uncle to her anyway.
He’s a smarter man than most people give him credit for, which is fine by him. He’s a man of few words and fewer emotions.