(Not really much. Just the green flag. Nothing happens, unlike my old projects where there were animations, but then again, it gives you something to read! ^^) - Up until Error found himself dragging US!Sans into the void with him, Error had become accustom to the emptiness of the void. Periods of silence didn't bother him, and he was content with the voices that bounced around his skull. All of that changed when he found himself with company. Now, don't get me wrong. Being in Sans' presense hasn't done much to crack the hardened soul of the glitch. He's no softer of a person than he had been in the time of his guest, yet US!Sans reacquainted him to something he had long-since dealt with. A sense of companionship. Not in the way of actual friendship or anything of the sort, but with the sensation of just. Existing. What had once been a mute realm was filled with sounds most take for granted. White noise was replaced with movement. Breathing. Clattering bones. Chitchat. And Error doesn't want to return to the droning silence again. It makes him uneasy. It reminds him of the loneliness he first felt upon entering the anti-void. That said, he often finds himself spending more time in AUs, where total seclusion isn't a worry. He wouldn't admit it to anyone, but he's grown wary of the absence of sound.
(Song is Gravity Falls Theme in 8Bit Version.) (Error!Sans belongs to LoverOfPiggies.) (I might be posting more headcanons.) (//shrug)