Bellatrix Lestrange (Harry Potter)

The most faithful member of Voldemort's inner circle, Bellatrix Lestrange (Helena Bonham Carter) is paranoid, insane and sadistic in all that she does. Both a Death Eater and highly skilled and powerful witch, Bellatrix is her leader's right-hand man and often proves to be more fearsome than Voldemort himself. She is gifted in battles and has bested many of the other characters. Her cruelty and love of torture is perhaps best proven when she gleefully kills her own cousin, Sirius Black. Bellatrix is a horribly evil character, but she's also a seriously powerful witch.

10/10