Your personal Tumblr journey starts here
It was a little worrying to see Gaster so blank looking. At first, Callisto had thought he’d tell them it was a silly idea; that there was no way they could guarantee that they could find anyone else to come back with them, that they couldn’t even guarantee that they weren’t just using this to get out of the Underground scot-free.
Callisto felt their heart leap at how excited Gaster was, smiling widely as he bounced. A genius. They were a genius! It made them bounce a little too, though less animated than Gaster. Not having to think of anyone else dying for this was making them feel a lot better--and knowing Asgore didn’t want to kill them was relieving.
They laughed as they were lifted off their feet, wrapping their arms around Gaster’s neck and hugging him tightly in return. Burying their face in the crook of his neck, they let their laughter collapse into joyful giggles.
“You don’t h-have to repay me,” They managed to splutter out, “it’s what friends are for!” They squeezed their eyes shut to avoid getting dizzy, though it was a little late for that.
The thought that all their poorly-executed backyard experiments would be a thing of the past, though, was extremely excited nonetheless. And not having to put out the money for a telescope would be nice, too.
For a minute he was entirely devoid of expression. Gaster blankly blinked at the child, his mind processing their plan.
“Callisto…You’re a genius!” All at once the scientist all but bounced with elation, laughter bright and buoyant, wistfulness lost in light of the thought of freedom.
“I’ve never thought of that before! No one has! With all that’s happened, no one’s even considered a human willing to set us free, but you, Callisto, you are a genius! An absolute genius!” He was gesturing passionately, a myriad of other hands popping up and following along in fervor. “No one else will have to die and we’ll be free to see the stars and feel the wind! Asgore must listen to you, dear young one, he must! He loathes the death of others more than any monster, you know.”
Gaster snapped his fingers at a sudden thought; the hands behind, beside, and all around him snapped in sync. “We’ll have to study a bit of course - cold, hard facts will convince anyone that your plan will surely work - but I’m certain it would work!”
Again, he laughed, the joyous sound resonating throughout the bundles of echo flowers, and twisted around to face Callisto once more. “And once the barrier is no more I’ll give you a telescope! One made by myself - it’ll be better than anything money could buy, I promise you. Oh, dear child, you have no idea how happy this makes me!”
With hardly a second thought Gaster plucked Callisto off the ground and spun them ‘round and ‘round, mirth warm in his grin. “We’ll go star gazing together! I can always assist you with any lab equipment, and anything else you need! It’d be the least I could do to repay you, once you set us all free!”