I agree Caleb seems the most likely candidate, but I'd hate for it be him. He was over-the-top and boring, and he's dead. Maybe it's the First merging with someone else?

With Joss :)))

But, seriously, I remember reading somebody's report that writers were very excited about Caleb and work with Nathan Fillion when Joss told them. They started to invent Caleb's trademark gestures and expressions, but Joss told them that, unfortunately, they don't have time for it. Maybe he's catching up.

So far, Twilight's scratchy neck made me laugh at least once.

And I don't think it's Riley.

I also doubt it. Although Buffy's dream has a very menacing Riley in it, it may be a coincidence.

Also this issue made me doubt the Twilight's original claim that its goal is to destroy all magic. Now it seems to be reverting the change brought by Buffy.

Looking at the bigger picture, I think that season 9 will feature the one and only Slayer again. No evidence, no rational explanation, just a feeling.

Giles seems more likely in this role.

In issue 3 Giles is trying to find out about Twilight symbol when he speaks with a demon. I doubt it was an act.