My Kerfer-O disintegrated before my very eyes.
I had sent Kerfer to go get reports where if the reports needed are Juliette and Kilo, Kerfer will get stuck near at river trying to cut through it but never actually goes to deep into the water. I think Kerfer died was because when it went to get them and was stuck at the river one of the hostel yellow wisps was above Kerfer just floating there, but not destroying her. I was able to control Kerfer back to base but since I wanted the floppy disc I had to deactivate her to get it, and when I did Kerfer disappeared leaving the floppy and the jacket they were wearing(Kerfer just popped out of existence). Looked on the radar to see if they show up on the map or at least the pieces but nothing was there, and the area where Kerfer got stuck showed no parts any were so I'm gonna assume they just got deleted.
Edit: It turns out Kerfer DIDN'T disintegrate but teleported to the balcony on the second floor from the main signal room. I have no idea how that happened.