Have you heard of (Insert show)? Well, the scary truth about it is ALL THE CHARACTERS ARE DEAD! You see, all the characters are based off of dead kids.
(Character) was originally a boy named (Name similar to one used in show) and he was a quite the diligent student, he always listened in class, however one day he (insert death).
(Character name) Was originally a boy named Squirrel and his parents were aboooooooooooooooooooooooosive and they hated him (Explains why his name sucks so much don't you think?) and he was only allowed to eat one meal per day so at one point he starved which is why he is so obsessed with food.
(Character) was originally a girl named River. She was your average girl who loved video games until one day she was sucked up by a supernatural light and ended up in a world identical to her favorite game and she needed to beat it to get out until she was attacked by an enemy and she died in the dream which made her wake up and get a heart attack and died.
(Character) was originally a boy named Leon. He loved superheroes and stuff like that so for his 11th birthday his parents had a dude in a Spider-Man costume come in to his party. It was good until the bouncy house exploded for no real reason and he died.
And what about (Supporting character)? Well, he's in a coma. And the spirits of all of these dead kids are haunting him and he sees them in his dream.
This theory doesn't prove anything but I just wrote it to sound like I am smart.