Antisepticeye is the sinister alter-ego of Irish YouTuber Jacksepticeye, who first glitched onto screens in 2016 during a series of horror-themed videos laced with hidden messages and ARG-style puzzles. With blacked-out eyes, a stuttering digital aesthetic and a voice crushed through distortion, the character became a fan-favourite villain of his channel's lore. Clips of the persona spread through jumpscare compilations, fan edits and meme soundboards, and the glitchy audio remains a staple for creators wanting an instant hit of internet-horror atmosphere.