Because you like Mello in Death Note
Reckless, vulgar, loud-mouthed: that's what makes Amethyst so awesome. See them in Steven Universe.
A malevolent dark wizard, Voldemort is so fearsome that he's known primarily as "He Who Must Not Be Named." See them in Harry Potter Series.
A born psychopath, don't expect Michael Myers to understand the difference between right and wrong. See them in Halloween.
Catwoman might be slightly unhinged, but you can't say this feline villainess isn't confident. See them in DC Extended Universe.
Wheatley's got an endless supply of bad ideas that he wants to share. See them in Portal Series.
Donna Meagle has a Benz, a fool-proof strategy to pick up men, and the number for R&B star Ginuine's direct line. Enough said. See them in Parks and Recreation.
Vash might act like a carefree, peace-loving goof, but it's not wise to underestimate this "Humanoid Typhoon." See them in Trigun.
Waylon Smithers would do anything for his boss, and would love to do a few things *to* him. See them in The Simpsons.
Johannes Betzler is an overwhelmed little boy caught up in deeply confusing times. See them in Jojo Rabbit.
With her consciousness so easily shifted between bodies, Motoko Kusanagi is left unsure of who or what she really is. See them in Ghost in the Shell.
Shaggy might be a bit of a slacker, but his heart and his stomach are usually in the right place. See them in Scooby-Doo.