Elise Rainier

Elise Rainier was a friend of Lorraine Lambert for many years and helped Josh during his child hood to escape the Old Woman from taking his physical body.

Insidious
As an early psychic, Elise was called by Lorraine because her son Josh was being terrorized by an evil entity that tried to gain his physical body.

Later, she is once again called by the Lamberts because they need aid to get their son back from the Further entities. Accompanied by her two assistants Tucker and Specs, she manages to gain her task and get Dalton back from the Further.

As she packs up for the night, Josh hands her his childhood photos, but as she takes them, she gives Josh a strange and startled look, and whips out her camera and snaps a photo of Josh. Furious, Josh goes in a rage and violently strangles Elise to death. It is revealed that what made Elise so scared was that she saw the Old Woman's dirty and shriveled hands, implying that Josh was possessed.