Because you like Tramp in Lady and the Tramp

A ball of cheerful energy, Pinkie Pie is as sweet as her name suggests and lives to bring others joy with laughter and parties. See them in My Little Pony.

A suave demon, Crowley grants humans their wishes in exchange for their soul, only to find loopholes that benefit him. See them in Supernatural.

Philip J. Fry accidentally cryogenically froze himself for a millennium. See them in Futurama.

Given his ability to wrench street signs from the ground, Shizuo Heiwajima is a useful one to have in dangerous Ikekuburo. See them in Durarara!!.

Felicity Smoak is a brilliant hacker who nonetheless becomes tongue-tied in front of attractive men. See them in DC Extended Universe.

Madman, murderer, or musician? No one knows the Phantom behind the mask. See them in The Phantom of the Opera.

When he's not working as a detective, Lucifer is driving around in a black convertible or having one-night stands. See them in Lucifer.

Major Marquis Warren is a talkative, sharp-eyed, and cold-hearted Civil War soldier-turned-bounty hunter. See them in The Hateful Eight.

A champion of chivalry, Don Quixote is dutifully bringing good to the world—even when others think he's out of his mind. See them in Don Quixote.

Anger-filled, merciless, and tortured, Kylo Ren is always at war—with the Rebel Alliance, and with himself. See them in Star Wars Series.

Wanting more out of life, Pam Beesly has a job she isn't crazy about and is engaged to a guy she's not sure is "The One." See them in The Office.