Zalgo (character)

Zalgo is an Internet legend about an ominous entity believed to cause insanity, death and destruction of the world, similar to the creature Cthulhu created by H.P. Lovecraft in the 1920s. Zalgo is often associated with scrambled text on webpages and photos of people whose eyes and mouth have been covered in black.

In Multiverse: Infinity War and it's sequel, he appears as the main antagonist.

Multiverse: Infinity War
Although it's unknown how he forged a Infinity Gauntlet of his own, and how he meet and made the characters Mary, Beldam, Wizeman and Uramiko his followers, it's revealed near the finale that he is a joke among other multiuniversal, powerful entities, and that he wants half of the multiverse to be his through a finger snap so he can have his own respect.

During the movie, as he combats heroes like NiGHTS, Rayman (those first two, the ones to call other heroes to fight him), Sonic the Hedgehog and company, the Crystal Gems and more, he gathers up the Infinity Stones, and succeeds, corrupting half of the multiverse and escaping to his home dimension so he can rest.

Multiverse: Final Level
No details are currently known about what happens to him in this movie, but the goal of the heroes' still standing is to finally bring him down.

Allies

 * Mary † - Enforcer and hinted Friend, later a traitor
 * The Beldam † - Enforcer and hinted Friend
 * Wizeman the Wicked - Enforcer and hinted Friend
 * Uramiko - Enforcer and hinted Friend

Enemies

 * Mary (after she betrays him)
 * NiGHTS
 * Rayman - Slave (in the finale)
 * Sonic the Hedgehog
 * Miles "Tails" Prower
 * Knuckles the Echidna
 * Amy Rose - Slave (in the finale)
 * Cream the Rabbit - Slave (in the finale)
 * Steven Universe
 * Garnet - Slave (in the finale)
 * Ruby and Sapphire - presumably, the same fate of their fusion.
 * Amethyst
 * Pearl
 * Bismuth
 * Lapis
 * Peridot - "Victim"
 * Kirby - Slave (in the finale)
 * Meta Knight - Slave (in the finale)
 * King Dedede
 * Bandanna Waddle Dee
 * Frisk
 * Chara - heavily hinted crush but "Victim"
 * Kris
 * Susie
 * Ralsei
 * Dipper Pines
 * Mabel Pines
 * Pacifica Northwest
 * Coraline
 * Star Butterfly - Slave (in the finale)
 * Kebako
 * Pucca - Slave (in the finale)
 * Ib - Slave (in the finale)
 * Yumi Yoshimura - Slave (in the finale)
 * Ami Onuki - Slave (in the finale)
 * Cornet Espoir
 * Kururu - Slave (in the finale)
 * Liddell

Others

 * Reala (?) - Victim
 * A Swords Knight † - Victim