After you were defeated, Frisk unlocked the barrier and released everyone. For a time people were happy, humans became friends with the monsters and monsters being friendly naturally(except Undyne, there was a mix up with a group of humans and-not important.)
I continued to follow Frisk, we'd been through alot together, with my only other friend being Sans(who could see me) and Nappstablook(who couldn't see me but felt my presense.)
But then something happened, we recieved a call from a modern Magician(turn to page 4 for- -Chara!- okay okay)
A Magician by the name of Nether, well that wasn't his real name, he decided to keep it hidden, or he didn't like his real name, its not important to the story.
He told us that in the past after the war that magicians used the seal keeping monsters at bay to seal the souls of the humans whose souls were bad, nasty and otherwise very unpleasant. They revived into the world as the shadow beings and beasts that are very aggressive, well some of them..one was nice and-
"Chara?"
-blushes O-O - right anyway when Alphys heard about this she outfitted everyone for battle, and gave me a body, cause even though I begged her not to, Frisk said "It was time" and told everyone about me following her and of the alternate timelines.
This also brought about the beginning of me being a robot and Core Frisk bringing most of the Alternate versions of our friends to this universe because "the fate of all universes hanged in the balance!"
"Whose Core Frisk?"
You'll meet them later, long story short, Interdimensional omnipresent and aware Frisk you follow me?
"UUUUUUUUUUUUUH -brain expended-"
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"Well thats enough of using your brain cells to comprehend what's going on, you'll learn more when we get into the heat of things."
Chara help Asriel get back up to his feet and they made their way through the Underground, which if Chara's story was any indication, would be one hell of a trip.
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Meanwhile deep in the Underground...
"Yeah Fell Sans, I'm here, King's kid should be somewhere here and I hear that Chara's made contact...good, If the past is any indication then he'll be helpful. Look I have to go."
"(mass of shadow creatures) HeHeHe"
"Looks like you all are looking for a bad time" said a short skeleton wearing a jacket, his eye glowing blue and yellow.