Caught outside the tower when Bear Witness hit, and frozen along with everyone surrounding it.
Donut reports her position after the Chaos Ritual: she is okay, but everyone surrounding the tower is frozen. Sledgie was still outside when Eris's Bear Witness landed and is stuck, while Bomo made it inside in time and is fine.
The split between the two is the clearest small-scale illustration of the spell's only reliable defense — being under a roof when it lands.
One of Donut's people caught outdoors and frozen by the Witness spell.
Also appears in books you've already read — spoiler-safe to their endings: