I stalk everything, obviously. Why are you even surprised? Also, it should be easier with Tempest because she could always just be picturing him as a halfling.

How Shader would die is actually part of the problem; it's difficult to find a plausible cause of death when she's such a survivor. When she got here . . . well. The first thing she'd probably do is take in that she's alive. The second would be to sniff out Chrono. Possibly on the people that have been sleeping with Chrono.

Ideally, instead of having them meet in the shrine room, I'd have her show up on the other side of Ceiling-Bob, all tinted and distorted. Big "Hehe~" cat grin. Get the full amount of doom sinking in before they met face to face.

As for topping, it's hard to tell. It would depend on where she ended up staying, who else was there . . . how much they meant to Chrono and how much they needed to be topped. Character relationships aren't really something I'm good at predicting in advance, but she's a pretty toppy person. Ptou might make it out okay, but Tempest would be pretty doomed.

Tell me something Irisviel wants to do with her family, now that everyone's here.