Further Discourse Upon the Nature of Reality

Jon clutched his head in both hands.
"WHAT'S HAPPENING TO ME!??" he moaned.
"Woah," Karyn quipped. "Deja-vu. But at least the narrator fixed that capitalization error this time."
"Karyn, this is my life!" Jon spat. "Stop making jokes! I don't remember anything! I don't remember my childhood, or anything about my family, or..." he hunched over on his bed, now on the verge of tears. "Please..."
Karyn put a comforting hand upon his shoulder. "I'm sorry. It's just that when you learn information like this...well, you either laugh over it, or you go insane. You wouldn't even notice it if I hadn't pointed it out to you; you would have just gone along noticing everything as it became revelant to the story, thinking and acting like it had always been so."
"But wait..." thought Jon aloud... "if you're right, and the information doesn't exist at all until this... "narrator" of yours mentions it...then why isn't he mentioning it when I think about it right now?"
"I think he's trying to make a point," replied Karyn.
"But he's torturing me! How could he be so cruel as to...to...to leave me conscious of the fact that I have no idea...who I am?"
Once again, Jon's eyes began to tear up at his existential agony.
Suddenly, he remembered! He did have a sister! His mother's name was "Samantha"! And he had had a childhood, the details of which shall not be discussed here for the sake of brevity, save to say that Jon personally found them all quite satisfactory.
"Well, that was a bit of a cheat, but thank you," whispered Karyn to no one in particular.
"That was your narrator?" Jon asked. He suddenly felt a great deal better about himself.
"You're lucky we have a relatively nice one this time." Said Karyn. "Some of them are positively gleeful when they torture us."
"You mean there's more than one?"
"Hundreds." Replied Karyn. "They create alternate timelines whenever they feel like it and rule over them for brief periods of time."
"Are they gods?"
"HAH!" barked Karyn. "If our narrator were a god, there's no way he would make so many spelling errors!"
"Why? Why do they do this?"
"Personal amusement," said Karyn without hesitation.
"Why can't they just leave us alone?" Jon whined.
"We would't exist at all without them," answered Karyn.
Jon sighed. It was alot to take in in just a few minutes. "It must be hard work to govern the entire universe like that."
"Actually no;" said Karyn. "It turns out that there are only a handful of real individuals in the universe; like...only a few dozen."
Even in the face of so much weirdness, this took Jon by surprise; "What do you mean?"
"You and me are ubiquitous," she said. "Sarah McMillan is pretty common too. Your grandfather occasionally turns up...not as often as you'd think, given his importance in the first episode..."
Jon looked quizzical; Karyn ignored him.
"Then there's your mother; your gothic sister Zoe--when she exists, mind you, and her friend Athena, and your little brother Mikey, when it's convenient for you to have a little brother. Your father turns up occasionally too, but, given the...shall we say, "nature" of most of the timelines here, his existence is of secondary importance. Then there's a handful of cheerleaders, the occasional decadent pervert, some antagonists, lust-objects and matriarchs with fetishes for sissification...and then a few one shot characters who turn up every so often, and everybody else is pretty much a faceless zombie."
'Uh...huh." Said Jon.
"Anyways, the upshot is that you're the most important person in the universe."
Jon was aghast. "Why?" he damanded.
"Well, I'll explain it to you," began Karyn...