Frisk curls up a little, resting their head on their knees and watching the crystal as Sans talks. Yellow. One of the dead kids from before was yellow too.

"They didn't just absorb the souls," they observe after a moment. It seems relevant. They're not sure there's any reason not to - the executives would probably be strong enough to keep them under control, more like Asriel than Flowey. And Asgore just kept them around because he didn't want them in the first place.

...well. No. He'd wanted Alphys to find another way too.

That's it. They're studying them to figure out how to do whatever it is they want. "We should try to get more back."