Lila is a teen girl from Italy and when she transferred to Paris, she instantly became popular at school, but it was not through honest means.  Lila is an extreme level liar as she craves attention and doesn't care who she hurts along the way to get it.  She's become obsessed with obtaining Adrian as her boyfriend as she sees him as a catch.  However, thanks to Marinette when morphed as Ladybug due to Lila lying that she was close friends with Ladybug, Adrian learned the truth about Lila and has since known how manipulative, selfish, cruel, and evil Lila can be.  While Adrian and Marinette are the only good guys who know the truth about Lila, no one believes Marinette about her behavior as Lila's sweet voice, acting, and behavior has everyone fooled.  However, as Lila has tried to ruin Marinette's life, Adrian has agreed to remain Lila's "friend" in order to protect Marinette from Lila's harm.