Amalia Vargas is Maggie's best friend. In her first diary, she is dating James, a junior at Vista. He becomes abusive and she breaks up with him with the support of her friends and sister. After this, she fears James, who has been stalking her since the breakup. He finally leaves her alone when she finds a new boyfriend, Brendan. Amalia is the manager of a band called Vanish. She was originally brought into the group by James, but the others realize that Amalia may have to quit if James remains. The other band members are Maggie, Patti, Bruce, Justin, and Rico. Amalia is fond of drawing in her diary. She lives with her parents and sister, Isabel.