Undershift AUby XxMagicDragonxX 2403In this Undertale AU, all the characters roles are flipped around. Sans and is flowey, Asgore is Gaster, and so on, please enjoy it!sansundertalecaretakeroftheruins+2 more Frisk X Gasterby Princess Chara The First3642Caretaker of The Ruins Frisk X Human Gasterfriskdreemurrcaretakerfriskundertaleship+8 more