Basically, Asriel is king (hyper death [first part of battle] form) and Toriel and Asgore live in the ruins... the barrier isn't destroyed, but the monsters don't really care. - K. XD

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(Third Person)

The woman looked down at her infant child that she held in her arm, while holding on to the railing, and threw it into the hole, "Worthess space waster."

The toddler landed on a patch of golden flowers and crawled to the next room and sat down on the floor. Toriel came in a few minutes later.

"Oh, my child! Did you fall down? Oh, you are younger than any other humans that fell! What's your name?" Toriel asked.

"Goo! Goo!" The toddler shouted.

"Goo? Oh... you are only a toddler," She realized, "you don't know how to speak yet. I am Toriel."

She picked up the toddler and walked through the RUINS while other monsters stared at the toddler in wonder.

"Asgore..." She started.

"Yes, Tori?" Asgore asked.

"... fallen, sugar..." She whispered.

Fallen was the code word for fallen child. Sugar was the code word for toddler. Buttercup was the code word for child.

"Oh! So... take them to... the P- King?" Asgore asked.

"Yes. Maybe he can help us... besides, I bet Kitty and the others would like a friend." She smiled.

"Then it's settled. We'll go in the morning. Maybe Frisk and the others would like to come along? Maybe, our... old friend...?" Asgore asked.

"Yes. I shall go call the others, including Dr. Gaster, while the toddler is asleep. We need to think of a name for them, though..." She trailed off, "Never mind, we'll figure that out later. Go put them in the child's bedroom... I think that might work."

"Alright, Tori. You go call."