For information on the general topic of 'where's everyone else?', here's the last time/place we've seen all of the current characters that are in the vicinity of the mansion. (Special thanks to Amenon's search engine for helping me double check a lot of this.) General note: as of the current comic, it is sometime right around sunset. The Oasis Room party has been going on most of the day, with Flora, Mike, and Evals having been there since the morning and everyone else apparently trickling in between then and noonish.
: currently in the Oasis Room (each linked to their most recent appearance). Note Nibs may or may not have left with Sythe, we don't know. It might also be possible that Eric has left since he's the only one we haven't seen since the montage page, but we don't know either way on this either.
Trace & Flora
: currently exploring the abandoned nursery. Worth noting that this is next to whatever room is behind the Giant Door of Ominousness.
Sythe & Maren
: in Sythe's room right before everything went crazy, apparently running afoul of whatever ~mysterious stuff~ is going on with the mansion.
Zen & Kat
: in Zen's room. Note that this was around lunchtime and that Kat seemed to imply that she would be going down to the party afterwards, but she never showed up.
: leaving Raine's room after their impromptu shapeshifting training session, saying she had work to do. Note that this was sometime in the late morning or around noonish - after breakfast, her conversation with Trace, and Maddie & Karen's adventure, but before Kat brought Zen lunch.
: lurking outside of the oasis room sometime during the afternoon, peeking in on the party and getting an eyeful (note this is well after their arrival, so she stuck around). Regarding her injury, it's unclear if she's actually really hurt or not. She certainly seemed to shrug it off, though how much of that might be bravado versus the legendary basitin durability is unknown. That said, a human might indeed have internal injuries after that sort of impact, but the mere fact that she's up and walking around (and for several hours) apparently without much discomfort seems to me to suggest she isn't really injured.
: the conversation with Keith about the legality of sleeping arrangements on the night of Team A's arrival at the mansion. Nowhere to be seen since then.
Brutus & Roan
: in the dungeons, shortly before things went crazy.
Clovis and his gang
: lurking mysteriously outside of the mansion sometime during the afternoon.
Sealeen & Landen
: staking out the outside of the mansion. Note that this was the night of Team A's arrival at the mansion, which was two days ago now. (One day ago was group B's arrival - pages 979-1021 - and then today is the day after that.)