Geno is a Sans from a Genocide Route timeline who injected himself with determination from Alphys' True Lab in an attempt to control the timeline, instead getting stuck at the Save screen alongside Frisk. He is now able to restore memories of people who forgot due to resets. Geno has an unzipped hoodie jacket with a white shirt underneath, along with short pants and fluffy slippers. He has a huge perpetually bleeding gash that he got after being hit in the Genocide Route.