Ennard first appeared in Five Nights at Freddy's: Sister Location, released in 2016, as a tangled amalgamation of animatronic endoskeletons that moves through the facility's vents and hidden spaces. Clips of its movement have circulated on fan soundboards and in gameplay edits ever since, where the mechanical, confined quality of the vent audio helps creators signal that Ennard is nearby without showing the character. Its continued use comes from that recognition among FNAF fans, who associate the sound with Sister Location's tense, claustrophobic atmosphere.