Because you like Huck Finn in The Adventures of Huckleberry Finn
Louise Belcher might be just a kid, but she can manipulate just about anyone with a pulse. All in the name of fun, of course. See them in Bob's Burgers.
A grumpy tourist trap owner, Grunkle Stan has a few deep secrets. See them in Gravity Falls.
An inter-dimensional demon, Bill Cipher dreams of a more chaotic Gravity Falls. See them in Gravity Falls.
A reclusive introvert, Liz Sherman has a temper that's literally lethal. See them in Hellboy.
Mavis Dracula's interests are anything black, scream cheese, and flying around. See them in Hotel Transylvania.
Josh Lucas just can't stop hanging around his stepsister's house. See them in Clueless.
Suzaku Kururugi defeats enemies with his flashy but deadly jump kicks. But he's willing to sacrifice himself for peace. See them in Code Geass.
Emily Gilmore is the DAR chair, proud grandmother, and full of opinions. See them in Gilmore Girls.
Randy Marsh is a geologist and Nobel Prize winner who is into binge drinking, starting riots, the Food Network, and P.F. Changs. See them in South Park.
An alien, a time-traveler, and an esper are following Haruhi Suzumiya, who – unknown to herself – is a near-omnipotent reality warper. See them in The Melancholy of Haruhi Suzumiya.