Thiago is a boy from Argentina that Uncle Grandpa tries to help overcome his fear of flying as seen in the episode Fear of Flying. He is voiced by Carlos Alazraqui.
Thiago is a young boy, he has a darker skin tone. He has brown hair, a long nose and a mole under his right eye. Thiago mainly wears a yellow shirt with a brown vest and blue shorts with light brown sandals.
Thiago is a real timid kid, he's is primarily afraid of heights as he fears that he'll fall down a die from going up to high. He also has a tendency to be a prime target as seen as while a fly, everyone and thing in Argentina tried to eliminate him. Once Thiago sees the bright side of flying he's too confident in himself and is prone to danger. Ultimatly after his whole adventure he's still afraid of flying.
- Despite him being from Argentina, his name is Portuguese and is commonly found in Brazil, the bordering country.