System 21: Origin

Prologue

System 21 is a laptop computer system existing in [...] which contains a very interesting property and shares a very interesting story.

How it came to be, no one knows. It just suddenly materialized in a well-known mall, looking like your run-of-the-mill laptop computer. Reproducing a price tag, it placed itself on sale before it got sold to [...] who was in the market to replace their old and broken laptop.

The very first game it ran was a game called Undertale.

The owner, [...], was unaware of the System's abilities. One of its abilities activated the moment [...] played the game. It scanned [...]'s emotions, likes, dislikes, personality and more.

Data gathered from the scan had churned inside System 21 creating characters from the game with a mix of [...]'s conscienceness. A small Undertale universe began to form in one of the countless pockets of the System's void.

System 21 Undertale is born.

During gameplay, the characters would go about their businesses. Following the game's codes to the T. However, the moment [...] exits the game and/or shuts down System 21, the characters existing were gifted with free will and their own conscienceness. Therefore, the codes binding them to their game is null and how the other systems outside of System 21 portray them to be is also null.

System 21's creations may look like the characters you've all known and loved. But they may not act like them most of the times due to the mix of data gathered from [...].

From the previous scans, System 21 had correlated the fact that [...] already finished the game from their old laptop and got the Neutral and Pacifist ending. Data gathered also depicted [...]'s reluctance to achieve the Genocide route and had to make do with gameplays of others thus acqyiring knowledge of how Genocide route works.

Connecting the data, System 21 divined a sense of understanding to the way [...] was playing: Pacifist route >> when nearing end game >> reset >> Pacifist route and the whole cycle repeats itself.

With all the resets happening and with [...] having different data aura scans during every playthrough, System 21 began to shape and reshape the Undertale universe. The game retained everything it originally is during player's gameplay but the moment when it's outside the game, everything wasn't the same anymore. Most especially to characters Frisk and Chara.

Chara became a non-evil entity outside of the game due to the constant activation of the Pacifist route. Frisk still embodies kindness and patience but now Chara embodies sass and temper.

Additionally, since [...] isn't finishing the game till the end of the Pacifist route, Frisk and Chara are unable to return to the Underground outside of gameplay. They have a special place in a separate void where no one from the game can get in and out, to and from the Underground. A place where not one of the game codes could reach to maintain certain attributes. Like aging.

Outside of the game, monsters from the Underground aren't bound by their roles anymore. However, their game codes are maintaining them to look like themselves during gameplay. They cannot age or die or change.

In Frisk and Chara's case, they are slowly aging up. What's worse, they cannot tell their friends and families from the Underground about it. Not until [...] gets to have them finish a route.

Days passed, [...] suddenly stopped playing.

Little did [...] knows, what they did had garnered fatal consequences to their Undertale universe.