Because you like Clarice Starling in The Silence of the Lambs
Dolores Umbridge keeps her villainy hidden (albeit poorly) behind a sheen of sugary pink politeness. See them in Harry Potter Series.
Baloo is a fun-lovin' bear who just needs the bare necessities of life See them in The Jungle Book.
This cannibalistic villain may be a loner, but Killer Croc doesn't have problems with self-confidence. See them in Suicide Squad.
Drusilla's hobbies include dolls, music, and killing people. See them in Buffy the Vampire Slayer.
Margaery Tyrell is one of the most adept and charming liars there is. See them in Game of Thrones.
Macbeth was probably named "Most Likely to Kill His Rivals" in his senior yearbook. See them in Macbeth.
Despite Norman Bates' typically kind and shy personality, he is also prone to occasional violent outbursts. See them in Bates Motel.
Tina Goldstein is better at getting the job done than following the rules. See them in Fantastic Beasts and Where To Find Them.
Jillian Holtzmann's madcap mind is always whirring and she will transform anything into one of her machines. See them in Ghostbusters (2016).
Intelligent Adele is soft spoken yet brimming with emotion. See them in Blue is the Warmest Color.
For Morgana, sometimes wanting to do the right thing can led you down the wrong path. See them in Merlin.