Nicole is the protagonist of Class of '09. She is a sociopathic teenager who enjoys ruining people's lives due to the trauma she has gone through in her past.

Jessica/Jecka is a "preppy" and popular high school girl. Nicole's best friend, who involves herself in Nicole's schemes or remains indifferent to them. She tends to be pressured by Nicole into doing actions, like skipping. Jecka seems to share near-similar opinions of men as Nicole. Has a drug addiction. Jecka is half mean and half nice.