Not very long, though they're approaching a bit slowly, keeping at a distance and in the air - the only one Skywalker can see at first is a woman in a Venetian-style masquerade mask decorated with fractals, on a hover platform up out of the easy range of any of the Nine except Shatterbird. There's a small space distortion around her, little flecks of color, though she's trying to keep it tight to her bodysuit, which is a very dark black.
She's also pretty clearly surveying, and she veers up even higher when she sees the carnage.
(Skywalker's sense of the Force can pick up on reinforcements out of sight - only two other capes, neither a major threat. They seem to be more surveying where the fires had spread before being extinguished than being extra cautious.)