Because you like Jenna Hamilton in Awkward.

He's the great Black Star, and he's come to assassinate you. See them in Soul Eater.

The main priority for Nagisa Hazuki is making sure that everyone has fun. See them in Free! Iwatobi Swim Club.

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.