The bulk of Greta's focus is on her friend, so it's Iman's response that she notices: the heightened closeness, which she takes as a good sign, and then the stiffness and quickening pace that seem to come from nowhere. Her brow furrows a little as she matches Iman's speed easily. What's the rush?

Then she hears him. Hears him again, really, but she hadn't noted him the first time. She almost turns around, but stops herself, because Iman didn't turn and it's obvious she's heard him, too, so she'll follow her friend's lead. The man is still behind them, though, not close enough to grab them but close enough to be unnerving. More than unnerving - after everything else they've been through, it's alarming. Who is he? What if he's from ROMAC, or whatever might be left of it?

What if they know what's happened to Iman's arm?

Greta keeps her face forward. "Do you know him?" she asks in an undertone.