Lorraine (Roberta Valderrama) is a villainess from 2014's The Purge: Anarchy. She is the sister of Tanya, one of the protagonists of the film, and the group of protagonists encountered Lorraine after Eva took them to Tanya's house.
The group was enjoying themselves, but Lorraine kept staring ominously at Tanya and Roddy, Lorraine's husband. Later on, Lorraine slowly enters the living room with a gun in her hand and shoots Tanya to death in cold blood. When her horrified mother tried to disarm her, Lorraine viciously beat the woman.
Lorraine's villainous motive: she had found out about Tanya sleeping with Roddy, verbally confronting him about the affair after killing Tanya. Lorraine later had her sights on killing her husband, stating that cheaters deserve to die. Roddy then took Liz (another protagonist) hostage in a futile attempt to appease his scorned wife. When Sergeant shot Roddy to save Liz, the evil Lorraine shouted that he was hers to kill before getting into a shootout with Sergeant. The protagonists escape unharmed, and Lorraine's fate is unknown.