Kate Randall (Book Character)

Kate Randall is Hanna Marin's stepsister. They have a big sibling rivalry that went on since their parents got together. they fight over almost everything, especially for their fathers affection, where Kate always gets the upper-hand. They also fight over Mike Montgomery; Hanna dates Mike to get back at Kate, but it turns out that Kate only pretended to be interested in Mike to see how far Hanna would go.