Barbara Lake is the mother of Jim Lake Jr.
"Barbara is the understanding, kind and protective mother of Jim Lake. She takes care of her son alone, because her husband abandoned her when Jim was only 5. She works as a doctor in the hospital of Arcadia, arriving to attend several cases related to Trolls. She is completely ignorant that her son is the Trollhunter, but knows that there is something hidden from her and worries that he may be putting himself in danger" - Official Description
Barbara is a tall, thin woman with auburn hair and blue eyes. She usually wears teal scrubs and square glasses.