I'm probably going to get stabbed by some people for saying these two roles...but...
Bellatrix Lestrange or Tonks in Harry Potter and the Order of the Phoenix.
Let the stabbing begin.
"I feel less blond now and, er, smarter!'--Keira Knightley
~77th Member of the Keira Knightley Posse!~
Wow... life hates me too... I bet it's a poser.--Chelle