Timothy Q. Mouse is the deuteragonist of The Chronicles of Thorn Valley. He is a mouse who is best friends with Dumbo the Elephant. He is the son of Bernard and Miss Bianca and the oldest brother of Elizabeth Jennifer Brisby. Timothy is also the uncle to the Brisby children.
In The Grand Adventure - Timothy served as Mewsette's right hand man. His childhood friend was The Once-Ler. In Rescuers Chronicles - Timothy and Mrs. Brisby were good friends with The White Rabbit. Timothy later on became the adopted father of Alice Mouse.