The birds are sitting close together (in peregrine terms) so I'd
say they are a pair or potential pair. Last year when Ivy arrived
before Trey, Princess wouldn't stay on the same building with him.
That's not the case here. That's also a indication that it MIGHT
be our resident pair - Princess and Trey.

Caveat: Until we get clearer images,
individual identities are just guesses.