Roman wasn't far behind the man, she was used to running for hours on end. It's what kept her from the Marshalls. Now she's willingly coming to them. Ironic.
She made a point not to be noticed, especially not by Narcissus, as she'd decided to call him in her head. She didn't know what would happen if he found her following him. For all she knew, if he was desperate for the promise of credits, he might even kill her for this. And she had no intention of letting that happen.