After the Mother went down and Papyrus pulled Peridot's ass out of the metaphorical fire, Zan had scooped her up and brought her to wherever the injured were being gathered and treated. Problem is, there's not a whole hell of a lot that doctors can do for soul damage. It's pretty much just bedrest or nothing.

In the immediate aftermath, she can be found near the tuck shop, resting in her bat form. Being smaller and fluffier makes it easier to get comfy. She's at least more responsive now, enough to check in on, but she looks gotdamn exhausted.