When he came back out of the bathroom, Lyra went in—clearly having the same idea he'd had.  He went under the archway into the foyer, where there was an unfamiliar pink mare wearing saddlebags strapped on her back. She smiled at him and stuck out a hoof. He stole a quick glance at her hip, in the hopes it would identify her role. It was three white stars in a diagonal line, with the center star bigger. What it meant was beyond him.