Because you like Kayla Day in Eighth Grade

Think you grew up fast? At 12, Mathilda is an aspiring assassin eager to avenge her family's murder. See them in Leon: The Professional.

Rainbow Dash's interests include flying, playing pranks, and generally being themost awesome pony around. See them in My Little Pony.

Ex-adviser to the king and most powerful sorceress, Yennefer is determined to be even stronger to attain her freedom in a war-torn world. See them in The Witcher.

Amy Townsend rarely wakes up in the same bed twice. See them in Trainwreck.

For Louie C.K., comedy is tough but fatherhood is even tougher. See them in Louie.

Carl Gallagher is a budding psychopath fascinated with rule breaking. See them in Shameless.

Don't mess with Mickey Milkovich unless you want to see the wrong side of one of his many guns. See them in Shameless.

Kenny McCormick is a boy of few words who likes nudie mags, NASCAR, monster trucks, origami, and Peruvian pan flute bands. See them in South Park.

Number Five is a 58-year-old man trapped in his 13-year-old body. See them in The Umbrella Academy.

The ever-cheerful Tonks can change her appearance at will, but she can't seem to get rid of her clumsiness. See them in Harry Potter Series.

The Little Prince is a childlike wonder personified in a tiny package. See them in The Little Prince.

Ted is a cursing, smoking, drinking teddy bear who's anything but cuddly. See them in Ted.