Because you like David Wooderson in Dazed and Confused
Severus Snape is a misanthropic potions teacher with a vindictive streak. See them in Harry Potter Series.
While Cassie Ainsworth's head is always in the clouds, her heart is always in the right place. See them in Skins.
Maka is determined to collect and purify 99 Kishin eggs– human souls that have been corrupted by evil– and one witch soul. See them in Soul Eater.
Greg Heffley will be famous someday, but now he's stuck in class with morons. See them in Diary of a Wimpy Kid.
Troy Bolton is a triple threat: singing, dancing, and basketball. See them in High School Musical.
Sheldon Cooper is brilliant in every way except, well, interacting with any human being. See them in The Big Bang Theory.
Albus Dumbledore oversees the most unsafe school in recorded history, with Dementors and giant arachnids run amok. See them in Harry Potter Series.
Pepper Potts can run a company, manage an egomaniac, and take down bad guys, all without breaking a sweat. See them in Marvel Cinematic Universe.
A believer in the pursuit of justice, Garrus Vakarian hates it when bad guys slip through the cracks of the bureaucratic justice system. See them in Mass Effect.
Rogue's touch is literally deadly, and she's trying to learn from the older mutants how to manager her powers. See them in X-Men Series.
Cady Heron is the new girl in town who's also new to the world of high school, period. See them in Mean Girls.