In this fourth installment Olive is trying to befriend new girl Kat, who turns out to be…catty. Only interested in the popular kids, backstabbing, passive-aggressive, and status-obsessed, Kat wants Olive‘s place in the popularity race. It takes Olive a long time to stand up for herself, and longer for some of her friends to see Kat‘s true colors. Best thing is that Kat makes some changes and Olive makes sure she doesn‘t become a villain forever.