While I was convincing myself to not to get too attached, I figured out his backstory:
ErrorSans eventually found the Aftertale universe, and of course found GenoSans. They fought and Error won, destroying what was left of his soul.
However, Geno still wasn’t ready to die - he still had to protect Papyrus from Chara. So through his own sheer will and the determination he injected himself with, he willed himself to continue, and became the horrifying anomaly known as Fatal_Error.
So let’s recap:
Error deleted Geno from existence.
Fatal_Error, through determination, un-deleted himself and put himself back into existence.
Geno is no longer a glitch.
He’s a fucking virus.
And this is why I fell in love with this character.
still hungry? well i brought something for you. this. the most important leaf in human history. the most important leaf in human history. it’s full of stories. full of history. and full of a future that never got lived. days that should have been and never were. passed on to me. this leaf isn’t just the past, it’s a whole future that never happened. there are billions and millions of unlived days for every day we live—an infinity. all the days that never came. and these are all my mum’s.
I’ve been training for just over a decade. Every day I’ve worked to hone my physical and mental strengths. I’m five feet, nine inches and 170 pounds of muscle. I’ve been built to survive, to maximize endurance and stamina, and I’m most comfortable when I’m holding a gun in my hand. I can fieldstrip, clean, reload, disassemble, and reassemble more than 150 different types of firearms. I can shoot a target through the center from almost any distance. I can break a person’s windpipe with only the edge of my hand. I can temporarily paralyze a man with nothing but my knuckles. On the battlefield, I’m able to disconnect myself from the motions I’ve been taught to memorize. I’ve developed a reputation as a cold, unfeeling monster who fears nothing and cares for less.