Geronimo Stilton
Vital statistics

Geronimo Stilton

Gender Male
Species Mouse
First appearance Lost Treasure of the Emerald Eye
Residence New Mouse City

Geronimo Stilton or OOG (code name) is the main protagonist mouse that appears in all of the books. he is the editor of "The Rodent's Gazette". He is brainy but a scaredy-mouse as he says in the books. He has several friends and has a sister name Thea, two cousins named Trap and Dino, a nephew named Benjamin,a grandfather named William and more. He likes Cheesy Chews. He is the main character of the series. He is also a secret agent. His sister Thea is a very adventures mouse and Geronimo is not a sports mouse.

Geronimo Stilton -52 Mouse in Space! - Kathryn Mckeon, Geronimo Stilton - Google Books
Geronimo with Benj
Geronimo Stilton
Geronimo's signature
Geronimo 2

Book AppearancesEdit

  • He appears in all the books.


Geronimo is a mouse with big ears and a quite small nose. His body color is brown with patches of white under his feet and on his chest continuing up to his mouth. He mainly wears a dark-green suit with a red tie, a light-green buttoned shirt underneath with lighter green trousers and glasses.


  • He appeared differently in The Wild, Wild West and the future books.
  • Most of the time he is wearing his uniform.
  • He is a scaredy-mouse.
  • He doesn't like adventuring.
  • He doesn't like traveling.
  • He does not know how to tell jokes.
  • He has a crush on Petunia Pretty Paws.