Although Casey is very opinionated about Derek being sneaky and cruel, she herself can be selfish at times.As the series progresses, Derek starts to rub off on her.Although Derek often gets what he wants at home and at school, he never does what he is supposed to. He also began to try harder in school and ended up getting into Queen's University, along with his step-sister Casey.When it comes to girls, Derek is also known as a womanizer.Sometimes, he goes to his stepsister Casey for some girl talk.Derek and Casey don't get along (although it doesn't mean they hate each other).He also a good hockey player (which he tells the girls in order to get even more girls).
Her only constant is her self-righteousness, and she often needs the school counselor to set her straight. She dated Derek's best friend Sam, but they break up, get back together and then break up once again which they then decide will be the last. Casey and Max broke up in "Rumor Mill", but then they got back together at the dance in "Rumor Mill". On her Sweet 16 Casey had to have an emergency Appendectomy.
He doesn't care much for girls, or their feelings, instead preferring to date the pretty girls and then break up with them.
However, he is considered to be very popular at his school.
They often clash with each other being that they are the exact opposites and the oldest children of the Mc Donald-Venturi's.
They go to the same high school and try to ignore each other in the halls.