Zoey

Marie

Ignacio

Galen

Ollie

Tala

Quinn

Bodie

Teacher

British

Vampire Bodyguard

Francis

Woman

Bodyguard

The Narrator

African lady

Soft Bubbly

Southern

Robot

Hailey

French

Hood

Indian Girl Accent

A French Girl

Male Russian Accent

Irish

Butterfly Cross. Male

"YOU.... DON'T KNOW ANYTHING ABOUT ME!"
— Killer!Sans to Outertale!Sans when killing him.
Killer!Sans (Alias: Killer) is one of the antagonists of Underverse. He is currently one of Nightmare!Sans' servants.
He loves and owns lots of cats.

Underverse Killer up to 0.6

Underverse Cross From X-Tale

XTale!Muffet is one of the major characters of XTale and Underverse. She is referred to as Code IV, and was the first being to convince XTale!Chara to rebel against her creator, XGaster.

its X-tale Muffet the leader of the spiders.....

Still friends for now

XTale!Papyrus (or simply XPapyrus) is a major character of the XTale and XTale and Underverse and a trainee of the royal guard. XTale!Sans appreciates him, despite multiple problems with their relationship. Even though Cross ends up killing everyone in timeline X with his Gaster Blasters, but him. Cross later kills him with a bone attack. After being revived by XGaster, Papyrus has mentioned being killed to Cross

X-Tale Papyrus

"hey other me. you will never dissapoint your people, okay?."
— Outertale!Sans to Classic!Sans when pushing him.Outertale!Sans is a side character in Underverse who was featured in Outertale. He made his debut in Underverse 0.4. He later died after being slashed by Killer!Sans.

Underverse Outer 

Fresh is a character in Underverse made by Crayon Queen. He is not a Sans, but rather a parasite possessing a Sans' body. He resides in the Sans' eye, his YO-LO glasses covering his true form. During the events of Season 1, he is enlisted by Ink!Sans to guard XTale to prevent Error!Sans from finding out about the X-Event, and in return he would receive the "funniest thing in the multiverse." When using Ink!Sans as a host, he takes the form of Fresh!Ink.

Underverse Fresh up to 0.7 part one

"I want to help you...but I can't believe in you."
— Underswap!Sans talking to X-Event!Chara
Underswap!Sans is a supporting character in Underverse. He hails from the Underswap universe. Although Sans intended to start unpacking and live out in the surface, he soon faced intervention from outside forces that ultimately leaves him homeless. He is eventually killed by XGaster, with his code stored in the quarantined Underswap.

Underverse Swap Sans from Underswap

"No life is a waste. Our identity doesn't make us more or less than anyone."
— Dream!Sans encouraging Cross
Dream!Sans is a supporting character for Underverse. While he doesn't play that much of a role compared to the other Sanses, Dream!Sans acts a spy for Ink!Sans's crew, providing them information regarding Cross/X-Event!Chara. When he's on the battlefield, he'll usually target his brother, Nightmare!Sans, for his acts.

Underverse Dream

"I AM THE X-EVENT"
— Cross' response to Underfell!Sans
Underverse (originally called Underverse!Sans) is the animated series created by Jakei95 majorly connected to XTale. It follows the story of Sans, and how one visit by an unfriendly face would mark the start of what was to be the greatest fight for the multiverse.

Underverse!

"The "Doodle Sphere"... WHAT A STUPID FANCY SKIN FOR ALL THESE STUPID ANOMALIES!!"
— Error expressing his hatred toward the Doodle Sphere
Error!Sans is a major character in Underverse. With both him and Ink!Sans deprived of fighting each other, Error sternly tells Ink not to create any more AUs and that he won't destroy any more of them. With The X-Event on the loose, Error sees the truce he created did nothing to stop Ink, and ends it shortly after his discovery.
He loves Chocolate. 


Underverse Error from up to 0.6

Epic!Sans (or simply Epic) is a major character in Underverse season 2. He is a major protagonist in EpicTale. He first appears in 0.6 along with the rest of the EpicTale cast.

Underverse Epic from up to 0.6

"Not everyone out there has the chance to have something like this. They would dare to take your place and steal your happiness." — Sans talking to the Outertale version of himself about the stars Sans (also referred to as Classic!Sans) is the main protagonist of Underverse Season 1, and makes a cameo in XTale.

Underverse Classic

"After all, there are thousands of alternate versions. Thousands of timelines in their own universes. Why even worry over a small affected fraction?"
— Ink explaining to Underswap!Sans his reason for helping XGaster

Underverse Ink up to 0.7 part one

"This is what has ruined our world ten times. I'm tired...but I'm forced to use this power"
— X-Event!Frisk explaining to XTale!Sans what's happening with his world

OVERWRIGHT BUTTON

"If you get hurt, you must hurt others as well. Calamity surpasses everything."
— Nightmare!Sans threatening Cross and Dream!Sans
Nightmare!Sans is the secondary antagonist of Underverse Season 1, and a master for Cross and X-Event!Chara. After Cross ends up having negative feelings, Nightmare enters his lonely universe, and they both create a deal that will allow them to extract parts of other worlds to his. He doesn't start causing problems until during Underverse 0.3.

Underverse Nightmare

Cross is a loyal guard to king Nightmare in the Moon Kingdom. He is enemy to the Sun Kingdom King Dream.

Cross a trusted loyal guard in the moon Kingdom

Geno is a character from Underverse. He first appeared in Underverse 0.7 Part 1. He is an alternate timeline version of Sans that injected determination into himself in order to defeat Chara but failed, sending himself into the save screen with the original Frisk from his timeline. He eventually left the save screen and began a new life on the surface of Aftertale, before encountering Cross.

Underverse Geno. More will be known later.

Sorry its taking so long I will be back hopefully sometime soon but I am not going to be here for a bit. 

Sorry :/

"Evolution requires sacrifice."
— XGaster's main ideology
XGaster is a major character in XTale and Underverse. He is the sole creator of the XTale universe. XGaster had lost complete motivation towards creating a perfect world, but after his visit by Ink!Sans, XGaster invests more time to creating "the perfect story" for his universe. This motivation causes tensions, not just within his own universe, but to many others soon afterwards.

""Evolution requires sacrifice.""

"WE CAN HAVE A GREAT TIME."
— Underfell!Sans pronouncing to Cross
Underfell!Sans is a supporting character in Underverse. When Cross shows up in his universe, and lays his waste all over Underfell, he tries to stop them, but is taken over by Cross himself. After he's freed, he's forced to join up with Sans and Ink!Sans to avoid getting destroyed by his brother.