Altertale is an Undertale AU where six characters have changed their roles with others. Sans has swapped with Toriel, Papyrus with Asgore, and Gaster with Asriel. There are no other swapped characters. Everything else remains the same, for the most part..

Contents

Characters

In this universe of characters, 6 characters vary, but some qualities of some characters prevail over the other.

• Sans — Toriel
  
• Papyrus — Asgore
  
• Asriel — W. D. Gaster
  

For example, AT Sans is 80% the personality of Тoriel, but only 20% the personality of Sans, and Toriel is 80% the personality of Sans, but only 20% the personality of Toriel. (AlterTale Sans = 80% of UT Toriel's personality + 20% of UT Sans' personality, and AlterTale Toriel = 80% of UT Sans' personality + 20% of UT Toriel's personality)

Sans

He is the keeper of the ruins and a formal king. Sans left the throne and moved into the ruins after his brother betrayed him. He also provides shelter for children before they leave.

• Toriel's personality prevails over the original Sans' personality.
  
• He is the elder brother of Papyrus and Gaster.
  
• He is the keeper of the ruins.
  
• He can still use bones and "Blue Heart" in battle.
  
• He can use telekinesis to move objects.
  
• He does not use Gaster Blasters.
  
• When AT Sans uses magical powers, his eyes light up blue.
  
• He has lived alone in the ruins for many years.
  
• He despises himself for not being strong enough to save the children.
  
• Despite many years of suffering, he is incredibly calm and relaxed, but sometimes it turns into a form of rudeness and savagery.
  
• His calmness is his protective mechanism.
  
• Sometimes he greatly misses his brother, although he diligently tries to hide these feelings.
  
• He often recalls his late brother, Gaster, and the fallen children.
  
• He has strong paternal instincts.
  
• He loves puns and hotdogs. He is also very lazy.
  
• Forgives Papyrus at the end of a Pacifist Route, but the restoration of good relations among the brothers takes a long time.
  

Papyrus

• File:FRcyFszWr8Q.jpgAsgore personality prevails over the original Papyrus personality.
  
• King of the underground and responsible for the death of 6 fallen children. Burdened with a great sense of guilt for what happened. He deeply wants forgiveness and to see his brothers again.
  
• The younger brother of Sans, and the older brother of Gaster.
  
• Still use bones and "Blue Heart" , but now wields a trident while fighting.
  
• Does not use Gaster Blasters.
  
• Can use telekinesis.
  
• When using his strength, his eyes glow reddish orange.
  
• Has lived in the castle completely alone for many years.
  
• Despite that he killed the fallen children, is actually a very nice and kind monster who cares about his family and the monsters in the underground.
  
• He has a purple trident.
  
• He does not like jokes in any form.
  
• He loves to cook spaghetti.
  
• At the end of a Pacifist Route, Sans forgives Papyrus, but it took much longer to restore the relationship.
  

Gaster

• The late prince of the underground, the younger brother of Sans and Papyrus. He was the first monster after the war to meet a human.
  
• Asriel personality prevails over the original Gaster personality.
  
• He looks younger than his real age (apparently 10 years old).
  
• In combat, uses bones and "Blue Heart", in addition to the majority of attacks from UT! Asriel.
  
• Does not use Gaster Blasters.
  
• Can use telekinesis.
  
• When he uses magic, his eyes turn purple.
  
• His older brothers taught him how to use his powers.
  
• Despite his age, he was very strong, which surprised his brothers and made them proud.
  
• He was sometimes mysterious.
  
• He was very occupied being a precious little brother.
  
• Turns into Omega Flowey on the Neutral Run.
  
• Turns into the absolute god of hyperdeath on the True Pacifist Run.
  
• He was Flowey.
  
• In the guise of Flowey, calls Toriel "Fluffy Dirtbag".
  
• 
  

Asriel

• Mysterious monster who worked for King Papyrus as a Royal Scientist. He was wiped out of existence after falling into the void, but Toriel and a third of his followers seem to remember him.
  
• Gaster personality prevails over the original Asriel personality.
  
• Father of Toriel and Asgore.
  
• Created his children in the True Lab.
  
• Was 35 at the time of "death".
  
• Was completely erased from existence, and can only be found by editing the game files.
  
• He sometimes appears to Toriel, but never says anything. He just stares at her, keeping a terrible expression on his face.
  
• Fully aware of the timelines.
  
• If it were possible to fight him, he would use fireballs, "Orange Heart", as well as Dreemurr Beamers.
  
• The Riverperson mentions "Beware of the one who does not exist".
  

Asgore

• Young and charismatic "Fluffy Pie", who dreams of becoming a royal guard. He is pure in heart and kind to all.
  
• Papyrus personality prevails over the original Asgore personality.
  
• He was created in the True Lab.
  
• Is about 28 years old.
  
• Son of Asriel, and the older brother of Toriel.
  
• Is the sentry of Snowdin.
  
• Attacks with fireballs and "Orange Heart".
  
• Refers to himself as the "Amazing Asgore!".
  
• Loves to bake buns and drink tea.
  
• He loves puzzles and Junior Jumble.
  
• He loves bedtime stories.
  
• Often calls Toriel "Tori".
  
• Trains the most with Undyne.
  
• He wears a purple scarf, not red.
  

Тoriel

Is the first monster you meet after the Ruins. Simple and fun, she likes to help Frisk get past her brother, Asgore, and his puzzles.

• Sans personality prevails over the original Toriel personality.
  
• She was created in the True Lab.
  
• About 25 years old.
  
• The daughter of Asriel and the sister of Asgore.
  
• Has only 1 HP, 1 DF, and 1 AT.
  
• In battle, uses fireballs and Orange Heart.
  
• May use Dreemurr Beamers (which are like Gaster Blasters).
  
• Fully aware of the timelines.
  
• To fight her is only possible on a Genocide Run.
  
• The only one who still remembers her father.
  
• Asriel's disfigured face still haunts her.
  
• She loves to bake pies, play Sudoku, and joke.
  
• When Frisk first meets her, she throws pie in their face.
  

"-Is You do not know how to welcome a new friend? Turn around ...
* Pie flies in the face Frisk *"
– Sanz! Toriello

• She loves whipped cream.
  
• Has a pet snail (named Slimey) instead of a pet rock.
  
• Has a small part of maternal instinct.
  
• Easily irritated.
  
• Tells Asgore bedtime stories.
  
• Sometimes calls Asgore "Al" or "Burn".
  
• Instead of Sans' depression, has anxiety disorder.