It turns out that the Ringmaster's powerful and skilled enough for her spell to pull the souls out of monsters who are basically just soul. It's impressive as all heck, and alarming, and mostly it's reassuring that yeah, she can totally handle the barrier.

As usual, Papyrus chooses not to worry about that stuff! His daemon, a snow goose (with the blue morph coloration, and orange eyes, and small crystals clustered on beak and legs and maybe fringes of stone on wingtips) is more of a worrier.

She'll want to check on Sans in particular, and other friends in general, after they figure out what's happened. Make sure they're okay, hang out talking a while, and be a bit clingy. She's a lot of the parts of Papyrus that really notice when they're worrying what others think of them, or what might happen in the future, essential to planning things out. Her loud honks of dismay or irritation go right with with Papyrus' own loud voice. They'll probably have a lot of very noisy conversations in place of his usual inner dialogues, going through her worries, his optimistic reassurances, her doubts, and ending in his insistent showy confidence in himself. That part, she'll never try to discourage; it's important they be true to themselves and work hard to accomplish all they want. And they are pretty great.