Marie Kessler

Marie is Nick Burkhardt's 53 year old aunt, but served as his mother after his parent were killed. She arrived at the home Nick shares with Juliette Silverton without warning driving a sport utility vehicle towing a trailer Nick never knew she owned. She told Nick they needed to talk.

Marie told Nick that he was one of the last Grimms, descended from the Brothers Grimm. Shortly thereafter, she was attacked by Hulda, wielding a scythe; Nick killed Hulda. Marie then gave Nick an object attached to a chain from around her neck.

At the hospital Adalind Engel attempted to kill Marie, but Nick intervened.

In Marie helps Nick on a case. While Nick is busy with this case, Captain Renard again instructs Adalind to try to kill Marie before she can share the information that will set Nick against Renard's group. This time he tells Adelind to hire human assassins. Nick has Monroe guard Marie as he can not do so while he is busy with the case. Monroe arrives at the hospital, and reluctantly guards Marie. While Marie and Monroe have a terse conversation about blutbaden and Grimms, Monroe sees a man stalking Marie's room. He follows the man to the basement and is ambushed by a second assassin. Turning to his blutbaden form, Monroe badly injured the two thugs, pulling off a gun arm, and so has to leave the hospital to avoid detection. He calls Nick to let him know that he dispatched two assassins, but that he could not be sure he got them all. Just as Monroe leaves a man dressed as a priest enters Marie's room and attacks her, but she fights back. Nick arrives in time to see marie kill the pretend priest, but her body gives out from the stress, and she dies in Nicks arms. Her last words are to tell Nick to trust in his instincts and nothing else.