Because you like Russia in Axis Powers Hetalia
Stan Marsh is a fourth grader who is the ladies man of his classroom. See them in South Park.
After years of living vicariously through other people's heroic stories, Wade Watts is about to become a hero himself. See them in Ready Player One.
Squidward Tentacles is a pretentious clarinet player in search of peace and quiet. See them in SpongeBob SquarePants.
A confident celebrity, Allison Hargreeves wasn't quite careful enough about what she wished for. See them in The Umbrella Academy.
A crabby troll, Karkat Vantas is perpetually angry about his lot in life. See them in Homestuck.
Alex Russo desperately wants to keep her magic – after all, things are so much easier when you can just wave a wand. See them in Wizards of Waverly Place.
A malevolent dark wizard, Voldemort is so fearsome that he's known primarily as "He Who Must Not Be Named." See them in Harry Potter Series.
A life spent as "Number Two" is bound to give Diego Hargreeves an inferiority complex. See them in The Umbrella Academy.
Sarcastic and always complaining, C3PO is a droid that despite his quirks you always want by your side. See them in Star Wars Series.
This lab mouse has one thing on his huge brain: trying to take over the world on a nightly basis. See them in Pinky and the Brain.