Isabella is a young rat girl that her role appears in the library. When Nicodemus tell Mrs. Frisby to stay in the library until they finish their meeting.
She is a small and quite also she is smart young girl, the that Supports that is being in the library almost all the time and also she is a girl that care about and all of other rats that shoes up when she accused that Mrs. Frisby is a spy from NIMH.
And also she is an honest girl that shows when she answered all the questions that Mrs. frisby asked her about NIMH.
In my opinion being like Isabella is a good thing. Because all what a person must have in his caretaker she have it in hers.
Brien, Robert c. o .New York, 1971. Mrs.Frisby and the rats of NIMH.