Nicki was Malcolm's girlfriend who he is forbidden to go out with by both his mother, Lois and Nicki's father, Boyd. As Malcolm describes her, she is a very psychotic girl who lives on the edge of danger and never stops doing what she's not allowed to do. So, Nicki and Malcolm sneak around with each other all the time and make it an ordeal when it comes to dating, keeping their relationship a secret from her father. She made her first appearance in the episode Forbidden Girlfriend. She is played