Zira had been preening alone in the apartment, while Crowley was off doing...whatever it was Crowley did, during the day. If he wasn't sleeping, Zira wasn't entirely sure he wanted to know what the demon was up to.
In any case, he felt a little thrill when Sonya buzzed up. "Coming down, my dear," he answered the buzz, and though his wings fluttered restlessly, he made his way down on foot.