The character is effectively a parasite. In the lore created by the community, EYX is an entity that mimics Sonic to lure in players, only to break the game and the fourth wall. The name itself is a corruption, hinting at the glitchy nature of the beast.

The most distinguishing trait is a giant, singular eye taking up the center of his face, which glows deep red when the entity is frenzied.

When creators search for a "sonic.eyx png," they are typically looking for accurate representations of the character’s highly distorted anatomy. The character's design radically subverts standard Sonic geometry:

Instead of iconic white gloves, Sonic.EYX sports bare, multi-jointed fingers ending in sharp claws.