Gustavo is a large electric engine who works on the Brazilian Railway. While Thomas was working in Brazil, he came across Gustavo pulling his express coaches on his express line. Upon first meeting him, Thomas thought he reminded him of another engine back on Sodor. Through their second encounter, Thomas concluded that the electric engine reminded him of Gordon, though not in a good way. This assumption continued when Gustavo insensibly (albeit unintentionally) instructed Thomas not to travel down the express line.