Meredith Walker

Meredith Walker is a recurring character in the series. She is portrayed by Maya Eshet.

Meredith is revealed to be The Benefactor, the secondary antagonist in the fourth season.

Season 3
Echo House

Stiles sees Meredith talking into a phone about telling "them" and she then mentions that one of "them" is behind her, assumed to be Stiles. She hangs up and walks away and Stiles notices that the phone is actually not working.

Season 4
Perishable

Brunski, the orderly, is seemingly revealed to be the Benefactor and was seemingly controlling Meredith. However, in his dying moments, he admits that he wasn't the Benefactor, nor was he controlling Meredith but that she was controlling him. At this moment, Meredith steps from the shadows and reveals that she is indeed the Benefactor.