The King Of The Multiverse is a fearless, serious, powerful King that cannot be erased. He's also rarely being impressed he never accepts defeat. He believes no one is superior to him. He can create, save, reset, overwrite, control and destroy every universe with a button. He works for Error404 though he doesn't admit he's his sidekick. Main goals is to watch over the multiverse and retain balance especially from Error404 brother "Infected", anything against his will, word result to a fight.

Powerful, fearless, cold, was made to be a King

Carl is the antagonist from the popular Roblox game "AIs becoming smart" his goals is trying to put up a gun, when he does he uses it recklessly to kill others. Carl's personality is unpredictable depending on the "player's" "endings". He's extremely intelligent AI and can hack his own game to get what he wants, everyone who interacts with Carl becomes part of his game world, however Carl just wants the stuck gun from the ground even hack you and delete you for touching it if not returned.

The ai antagonist with artificial intelligence 

Error404 is an unstoppable force, what takes the files of beautiful worlds to recreate his universe that was destroyed by his brother.
Error404 also made the 'King of the Multiverse' as a sidekick.
When Error404 fights he's using the most advanced scripting to erase, give, heal, restore, spawn, create anything he wants. He's usually quite and not really aggressive, he's also extremely intelligent and knows everything from games, anime, and alternative timelines

The True God, unstoppable force, made to lead 

Kind, silent, determined. Alpha Judge is a white ghost skeleton with burning tears and uncountable souls behind him to assist him against evil.
Bravery for short combat, Integrity for menacing aura, kindness to heal him max every 2 milliseconds, Determination Blade that cut cut anything, Soul Canon that fires a God beam from all the soul and "Goner" button to delete evil entities.

The form of a true Judge 

He's unstoppable, aggressive, brutal, cruel murder, god slayer that eats Gods and people to gain their powers and destroying people's minds. He destroyed his universe and attacked his 3 other brothers there, but they survived and became gods themselves within the multiverse.
Infected holds an axe with magic in it, he controls souls to make explosions
He can manipulate souls and spirits like God.He cant be erased nor killed. He enjoys causing chaos. He works alone. He will attack you at random =)

A ruthless killer =)

Anti principle is a mechanism that can transcend absolutely everything and anything even itself.
This was originally a joke but in this version Anti Principle tries to figure out what character could potentially kill him

Anti Principle if it wasn't a joke

Player has is a dirty hacker that has access to any game codes when within their world, they have knowledge of the multiverse and timelines, they try to enjoy the game however their actions to manipulate the world can crash their game so they try to careful. 

Your average Player

Omni is a silent and reserved individual with his personality being completely vacant from his person though he does show signs of his dormain emotions he mostly keeps these feelings reserved and kept away.
In battles he fights calm as he knows he can destroy his enemy with his Kronos eye future, Zeus eye thunderbolt manipulation even fire, air even gravity or with his very own limitless strength and speed. His past self known as 'Ares' doesn't interested him anymore.

Chaotic Heroes, Noble Villains. Which is correct?

Infinite code also known as Fortran is someone who delights in tearing down the foundation of society and blurring the line between good and evil; concepts he doesn't believe in. He wants to remake fandom. He's infinitely above, control, authority, and transcendence over everything to exist, not exist, can exist, won’t exist, possibility, impossibility, improbability, probability, infinite, finite, metaphysical, pataphysical, concepts, no concept, and every concept. He's serious and intelligent.

The True Narrator.

It's Sans from Undertale but kinda dying, so his father gaster returned from the void to help him.
Sans believes dying is gay, so he won't die.
Also Gaster lends sans the ability to change the timeline at will, for example swap positions, switch places, nullify attacks, spawn a shit ton of bones and Gaster blasters.
And yes for the record sans is homophobic that's why he won't die.

Virus404 also known as Jack was created from Infinity Code that's now trapped, virus404 now travels trying to surpass Error404 as they are both equal. Jack can be classified as an cruel, cocky, evil, cool and eccentric maniac who delights in causing chaos to Godverse. In battles he goes nuts, he's confident and usually uses his codes to rewrite, corrupt, infect the multiverse or even change his own code to gain abilities, gain access to nonexistance and erasure to boundless. Cannot be erased.