Bellatrix Lestrange (Helena Bonham Carter)
We don't get to see too much of Bellatrix in this film. In fact, most of her screen time occurs when Hermione is impersonating her—so, er, it's not even really her, just her appearance.
The real Bellatrix does end up in a duel with Molly Weasley at the end, and Molly kills her. Another evildoer bites the dust.
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