Frisks soul got infected causing them to be a zombie, still capable of speaking a little bit, lacks any sort of morals or limits, their hungry fully controls them and forces them to eat any living person they lay eyes on, super hungry and needs to eat living flesh to sustain themselves, they look just like frisk but with pale skin torn and bloody clothes and a sort of zombie shamble walk, not contagious,hates their condition but they’re forced to keep eating living things