The Girl: She's the loose cannon whose favourite past-time involves murdering Harry Potter's loved ones.

The Badness: Compared to Bellatrix, Bonham Carter's sociopathic Marla (Fight Club) and sinister Mrs. Lovett (Sweeny Todd) are as meek as kittens.

Bellatrix is truly, truly evil. The kind of evil you only find in kids' movies. But scarier.

So Bad She’s Good? Hell, no. We'd keep a wide berth. This one ain't messing around.