Frisk is a girl from the human world. Monster only exist in fairy tales and Videogames. She spends most of her time in front of her computer, but one day it is infested by a strange virus. Her ghostfriend "Chara", wants to clean her PC, but Frisk quickly realizes that the virus has an seemingly independent existence. An independent existence in which she can intervene freely. It's a game. But the Game is getting bitter truth as monsters begin to come out of the computer...
When a character falls out and a reset happens the character gets deleted from the game which affects the Story of Undertale. What happends when Sans never existed in the Underground? Or when someone suddenly makes an genocide through the RUINS? Amalagmates are walking freely outside? Papyrus and Undyne enemies?
20 years is the time which replays again after a reset with the data which is there.
Everyone who leaves the gamecode forever will be forgotten and treated like they never existed. Every existence which depended on someone who got erased from the game will either:
- • forgot the erased person and will depend on others when they are older than 20 years
- • will never existed when they are under 20 years old, since the reason why they exist is erased and 20 years plays again from the start without their reason to exist.
Flowey got created by Alphys, 19 years ago. -> So Floweys existence depends on Alphys.
When a reset happens which erases Alphys data, everyone will forget her, but all her actions before 20 years will still be ingame. Flowey, however, won't have ever existed.
Magic still the same
When a character or thing falls out of the Game it becomes real. Therefore also it's abilities and appearance becomes real. Their magic and everything still works the same way as in fiction. A monster can't be pulled out before it didn't fall out once and is "converted".
Since the Game is a Virus, there are doppelgangers of every bossmonster in a virial version. These Viruses aren't part of the Game and can't be seen, heard or felt. They also can't interact with the Gameworld and live in it's code. They eating, corrupting and destroying data on the gadget they infected. They can also fall out. If the Viruses corrupt someone/something it's code get crashed and mixed up. The being will lack it senses, hearing, seeing, feeling, smelling, tasting. It won't even know if it still thinks or if it's already dead. Is it over already?
Frisk and Chara are both female in this AU.
Frisk is a normal girl from the human world. She is a little computer addicted and all the time alone at home. She has a hard time befriending people even when she is absolute pacifist and friendly (except for some games like shooter). But even with her immense patience, Frisk doesn't fear to tell others her opinion. She will change later a lot and gain a special ability. (Character link: Virus!Frisk )
She is the second one who fell out of the game. It's the evil reincarnation from the Genocide ending which asks you to help destroying other worlds. She lost most of her memory at the beginning but remembered after she entered the game again as 'Player.' As ghost she can't be seen outside of the game. She usually carries a little Chara-Doll around her or uses screens, paper or windows to write on them. She has the abilities of a Poltergeist and can also still summon her REAL KNIFE. Chara will fall out later again while she is a Player. With that she will remain in the body of the Player. She will still have the same abilities, just an added physical body and small wings. (Character ref: Virus!Chara )
The third who fell out. After experiencing a Genocide run caused by Chara, Sans fell injured and with zero HP out of the Game into Frisk' basement. He survived and healed while Xans (look below) was in his body. Because of his teleportation ability, Sans is now able to switch between Real- and Gameworld. Since he left the game he also doesn't lose his memory after a reset anymore. The skeleton hates Frisk at first and wants her to stop playing with their world, until other monsters fall out of the game. Since then his goal is to free all monsters from the game. Because of Xans Sans' abilities changed. He can't use bones and Gasterblasters anymore, but the same attacks as Xans. Sans is also able to see the Viruses ingame now, to everyones suprise. Xans will immediately use this chance to kill him, again. (Character ref: Virus!Sans )
Papyrus & Flowey
Papyrus is the brother of Sans and a cheerful happy, naive skeleton, eager to become member of the Royal Guard. Until Sans happens to be outside while a reset. Sans got deleted from the game existence, leaving Papyrus all alone. Now, Papyrus got raised as child from the evil Flowey. Flowey teached him "It's kill or be killed" and that LV means anything in this world to survive. Papyrus is now an experienced and feared fighter. He is mistakenly known as murderer of Queen Toriel and chased by Undyne and the Royal Guard. Papyrus is a sad, depressed person which only wants to be friend with everybody, but doesn't know how. And Flowey won't let his little toy go. (Character ref: Virus!Papyrus )
Xans is the virus doppelganger of Sans. His name is Sans as well until Frisk renames him to Xans to respect his indiviual being. Xans is an aggressive and mistrusting person. It is hard to befriend him, but once you did he protects you with everything he has. His abilites are all databased and filled with coding. He also has "datawings", can teleport and use the blue soul mode like Sans. He gained a different appearance long ago through DETERMINATION. The right eyesocket is special shaped, his eyes have different colors and size, his feet are raptor claws. Xans has a special affection for every AU Papyrus and wants to save and protect everyone. On the back of his skull is a flower from Vlowey to force him to do things for him.
Vapyrus is the virus doppelganger of Papyrus. Renamed by Frisk. Vapyrus acts like the classic Papyrus to comfort Xans. Vapyrus is an open, friendly and curious person. Sometimes he forgets to talk loud like the original Papyrus and acts slighty thoughtful, sad- but these moments are really rare. As a virus he still destroys and does bad stuff, but he doesn't exactly know "it's bad" since it's his only pupose in "life". He is befriended with Vundyne and Xans. (Character ref: Vapyrus )
Vundyne is the virus doppelganger of Undyne. Renamed by Frisk. Vundyne acts pretty much like the classic Undyne, she only is a little more sassy, mean and sometimes evil. She believes that they all get to be free one day. She is a good friend of Vapyrus and Xans, but sometimes she abuses the flower on Xans' skull, causing him indescribable pain when he annoys her.
Vasriel & Vlowey
Vasriel and Vlowey are doppelganger of Asriels different forms. They both exist at the same time and are attached to each other through Vloweys vines. They also share one SOUL. Vasriel & Vlowey are evil, can be counted to the antagonists of the story. They blackmail Xans and use him like a slave. They prefer to watch and act in the background. (Character ref: Vasriel & Vlowey )
The first who fell out of the game. Gaster was the first who fell out and got deleted from the timeline because of a reset. The scientist somehow managed to get into the code of Undertale and edit it. He is the cause why monster falling out of the virtual reality. Gaster also lost his form and is only floating hands and a mask. He fights against Frisk until he realized that she means no harm. Gaster will cause a lot of trouble.
Ryu is a modified copy of Xans, created by Chara. He uses bones, blasters a scythe and a black soul mode (Dependency) in battle. Ryu is meant to be a reaper/deathgod to see dead people. That way Chara wanted to make sure that Ryu will be able to see her. Because he was added to the Undertale game, but had no placement in the story he got stuck in the secret room in SNOWDIN and nearly died there. He was able to see the code and viruses watching him, but he couldn't left the room, neither he could eat the stuff in it. When he finally fell out, Chara took care of him. Since he already loved her like she programmed it, he only got more bounded through her affection. They are like partner/lovers. Ryus personality is pretty simple: He wants to kill, but neither he wants trouble. So he holds back and is most of the time bored. Since Chara consideres Frisk & Co. as family he would never harm them and stays neutral. (Character ref: Ryu )
More info about Undervirus Sanses here
• Xans' theme here
• Vundyne's theme here