- "From the start of the Guard a lady has reigned, she commands but more importantly she leads. To take up their task her Guardmice are trained: deliver the service each common mouse needs."
- ―Mouse Guard Alphabet Book
A Matriarch is the highest-ranking position in the Mouse Guard and supreme ruler of the city Lockhaven. Her job is to allocate and coordinate the Guard Mice where they are needed most. The Matriarch's responsibilities are absolute as there is a lot of ground in the Mouse Territories to cover.