Cady Heron is the main character in Mean Girls. She infiltrates The Plastics, only to sort of become one herself. But give the girl a break; she was home-schooled most of her life and it takes awhile to learn about yourself in an environment such as high school. Eventually, she does.
Cady: Hey! Regina: Why were you talking to Janis Ian? Cady: I don't know, I mean, she's so weird, she just, you know, came up to me and started talking to me about crack. Regina: She's so pathetic. Let me tell you something about Janis Ian. We were best friends in middle school. I know, right? It's so embarrassing. I don't even... Whatever. So then in eighth grade, I started going out with my first boyfriend Kyle who was totally gorgeous but then he moved to Indiana, and Janis was like, weirdly jealous of him. Like, if I would blow her off to hang out with Kyle, she'd be like, "Why didn't you call me back?" And I'd be like, "Why are you so obsessed with me?" So then, for my birthday party, which was an all-girls pool party, I was like, "Janis, I can't invite you, because I think you're lesbian." I mean I couldn't have a lesbian at my party. There were gonna be girls there in their *bathing suits*. I mean, right? She was a LESBIAN. So then her mom called my mom and started yelling at her, it was so retarded. And then she dropped out of school because no one would talk to her, and she came back in the fall for high school, all of her hair was cut off and she was totally weird, and now I guess she's on crack.
Gretchen: Well, I mean you wouldn't buy a skirt without asking your friends first if it looks good on you. Cady: I wouldn't? Gretchen: Right. Oh, and it's the same with guys. Like, you may think you like someone, but you could be wrong.