Jeremy

Jeremy is the crow friend of Mrs. Frisby.

History
A day, He got tangled in the silver ribbon on the fence, just for being "shiny", Mrs. Frisby saw him and asked him not to move or Dragon the Cat would appear, so she helps him untangle himself and asked him to see the Cat nearby, Mrs. Frisby manages to untangle it and just the dragon appears, so Jeremy is carried away with Mrs. Frisby away until he reaches his house, Jeremy thanks Mrs. Frisby for saving his life, Jeremy tells him his name, and he is indebted to Mrs. Frisby and tells her that if she has a problem, she can count on him and Jeremy flies away.

While Mrs. Frisby was trying to figure out how to move her house since Timmy cannot get out of bed due to his Pneumonia disease, she meets Jeremy while he had a piece of aluminum sheet, she decides to ask Jeremy for help, and he shows the aluminum sheet and Mrs. Frisby asks Jeremy why he is so interested in shiny things and he tells her that he has a friend he always takes him to and Mrs. Frisby guesses that Jeremy's friend is a female and Mrs. Frisby tells Jeremy about her problem and he shows compassion for her and he doesn't know what he should do but he tells her that when the birds have a problem, they consult with The Great Owl and Jeremy suggests that she should talk to him about their problem and Jeremy he tells Mrs. Brisby that in the afternoon take her to meet the great owl.

In the afternoon, Jeremy came to Mrs. Frisby's house to take her and he meets Mrs. Frisby's children, Teresa and Martin, except Cynthia who she is afraid of him, Jeremy carries Mrs. Frisby flying on his back and Mrs. Frisby is surprised by the view from above while she flies with Jeremy, she saw a lake and says that it looks like a snake but he tells her that that is the lake, they arrive at the tree of the great owl, and Jeremy talks to the owl and He tells him that his friend (a mouse) has a problem, the great owl is surprised by the friendship of Jeremy and Mrs. Frisby and he tells her that she saved the life of Dragon the cat and the Great Owl allows Mrs. Frisby to enter her tree to save a crow.

Jeremy waits outside the tree for an hour while Mrs. Frisby talks to The Great Owl, Mrs. Frisby comes out of the tree while Jeremy complains a bit about waiting outside for too long and he takes Mrs. Brisby back home while she tells him that The Great Owl recommended that he seek help from the Rats and Jeremy is surprised because the Rats do not want to know anything about anyone and when Jeremy leaves Mrs. Frisby at his house he gives him thanks for saving his life and Jeremy flies away.

Jeremy does not appear again later but the one mentioned several times by Mrs. Frisby and in the ending, Martin wants to visit Thorn Valley one day and comes up with the idea that Jeremy will take him there one day.

Depiction in film
Jeremy's role in The Secret of NIMH is largely identical to his role in the novel, with the only exception being that in the film, Jeremy is a character Comic Relief. In The Secret of NIMH 2: Timmy to the Rescue He takes Timmy to Thorn Valley and later Jeremy along with a caterpillar named Cecil rip off the forest animals while Jeremy is pretends to be The Great Owl.