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Thea Stilton: Thea is Geronimo's younger sister, and is the complete opposite of Geronimo when it comes to adventure. In the books she doesn't really notice or help Geronimo when he is in trouble but in the TV series she usually helps him. She loves it almost as much as she loves riding her motorcycle or flying her plane. A special correspondent for The Rodent's Gazette, Thea is always on call to transport the team to new adventures, and is always ready to jump into action. Voiced by Sarah Edmondson.

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