Because you like Sheldon J. Plankton in SpongeBob SquarePants

Irene Adler has to use both her brains and her body to survive. Luckily, she's usually the most brilliant person in the room. See them in Sherlock.

There isn't a man in the world who executes his job with more finesse than Monsieur Gustave H. See them in The Grand Budapest Hotel.

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!!.

A crooked cop, Harvey Bullock is the product of a not-so-just criminal justice system. See them in Gotham.

Joey Potter is a low-key girl next door in love with her best friend. See them in Dawson's Creek.

Darlene is a free-spirited hacktivist who follows her own moral compass. See them in Mr. Robot.

Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.

Hanna Marin is a determined girl defined by her ability to transform herself. See them in Pretty Little Liars.

Kiara Carrera is a hippie socialist who likes sea turtles more than people. See them in Outer Banks.

As the Rose Bride, Anthy Himemiya is a spectator in the fencing matches fought over her and her power "to revolutionize the world." See them in Revolutionary Girl Utena.

A Silurian lizard woman, Madame Vastra has a penchant for puzzles and interspecies romance. See them in Doctor Who.

Gina Linetti views herself as a sort of life coach/influencer to the rest of the office. She's not so keen on the "work" aspect of her job. See them in Brooklyn Nine-Nine.