What is Rebecca Lowell's connection to Nikki in the novel, Airhead #1: Airhead?

Rebecca Lowell is Nikki's agent, as well as the person who first discovered Nikki and introduced her to modeling. She is described as a red headed, middle age woman who seems to genuinely care for Nikki's well being. Rebecca is supportive of Nikki's/ Em's decision to go to high school.