Because you like Donatello in Teenage Mutant Ninja Turtles

Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.

The quiet, intense Daryl Dixon lets his crossbow do the talking. See them in The Walking Dead.

Juno MacGuff is hoping sarcasm will get her through the stress of teenage life. And also, teenage pregnancy. See them in Juno.

Gloria Delgado-Pritchett's big personality is rivaled only by her big heart. Wait, did we mention she's gorgeous? See them in Modern Family.

Effy Stonem is cool and collected with a wry smile on her face and a cigarette between her lips. See them in Skins.

Ponyboy Curtis is a "Greaser" on the surface, but he's a sensitive poet underneath. See them in The Outsiders.

Fiona Gallagher wants to be able to give her siblings everything that they deserve because her parents aren't going to do it. See them in Shameless.

Buttercup is a farm girl turned princess who'd do anything to have her old life back. See them in The Princess Bride.

Hannah Baker is a buoyant spirit broken by the cruelties of high school. See them in Thirteen Reasons Why .

Smart and sensitive Sam Winchester tried to escape the family business, but ghosts have a way of haunting you. See them in Supernatural.

A natural leader, Clarke Griffin dispenses both justice and mercy, and she does it all while being selflessly humble. See them in The 100.

Alison DiLaurentis believes you're always better off with a really good lie. See them in Pretty Little Liars.