Frisk:never left

This is my undertale au where Instead of passing the purple gates, Frisk turns around and chooses to stay in Toriel’s home permanently. They accept this life completely. Over the years, their Determination morphs from a desire to escape into a fierce desire to protect the Ruins.The Second Caretaker: Frisk grows into a teenager/adult under the purple brick arches. Raised by a Boss Monster, Frisk learns to channel their soul's energy into mastering Toriel's signature fire magic, burning a unique Determination-red.The Underground Stagnates: Outside the Gates, the world stalls. Asgore waits endlessly for a seventh soul. Undyne eventually retires, leaving the Royal Guard to Papyrus, whose innocent desire to catch a human hardens into a strict, royal duty. Every undertale character is in here, but just to mention Monster kid is being trained by papyrus.