Emily

Plot:

Emily confronts Naomi over her supplying Sophia with drugs. Emily has learned that Sophia was gay and her locker is a shrine to Naomi, who denies any sexual relationship with Sophia. Emily and Naomi then move in together, but at a party where Cook assaults another guest for no apparent reason, Emily gets Sophia's brother to open a box that contains Sophia's hand-drawn account of her affair with Naomi, who rejected her for Emily, hence her subsequent drastic actions.