From the sound of it, it’s the territorial squirrel youncan have a conversation with at the top of the elevator.
I also heard you murder someone in your sleep. Not sure who or if its permanent
Yes, is that squirrel, you can do the same with Tav but it's a dialogue option and DU is automatic (at least on the footage)
You can destroy the bard's (always forget her name, Alina?) lute with Tav too but again DU on the footage does it automatically.
I won't say who you murder in your sleep (just in case) but I'm guessing it works like any other murder on camp, you can probably use revivify scroll.
