Axeswap is a Underswap timeline. Chara stayed in the underground and Temmie killed Queen Toriel leaving the King, Asgore, to leave the ruins to rule over monster kind. Chara later married Papyrus. Frisk was somehow resurrected and would later also marry Sans. Temmie came back and killed Asgore taking the souls and creating a virus called the hunger, all monsters were infected. Frisk left the Underground for help, while Chara died to the Temmies, while Frisk was in asylum by humans and had Aliza