"Fred doesn't fit the profile." Yet. He paused looking at Sam, "I'm not certain enough to say that you're wrong but I get the impression that even in Purgatory there would be more demons or purgation or ...something."
He cleared his throat, "There's another possibility. Where I came from there was a old, very powerful demon capable of bending time and space. I'm not saying that it's her..."
Angel gave Wes a meaningful look. He didn't say the name Illyria because Angel had accidentally called Fred that once. He didn't want to upset her (or Illyria, if this was the demon posing as Fred after all).
"...but it could be something like her. It would explain why we could be taken from different points in time without even noticing any of our friends missing, why so many of us were taken just before we died. Maybe it's easier that way? But if it is a similar creature it probably wants something."