Cassie is a very complicated character. She suffers from anorexia nervosa, self harm, and low self esteem. Her entire self worth is dependent on her weight, in one episode saying "I didn't eat for three days... so I could be lovely." She also drinks alcohol and takes drugs. In the episode "Tony" she is seen sorting food, a common occurrence shown by people with anorexia. Despite Cassie's many "problems", she is a very gentle, caring, and loving person. Written on her "about me" section of the "Skins" website, she talks about how much she loves her baby brother, Reuben. Cassie will even act positive to bad news so that she will not offend.