She waits for him to follow, at the very least she's not going to leave him on an unfamiliar roof in the center of town. Once he's closer, she resumes her stroll towards the elevator and there's a soft 'pop' as she brings a mug of hot chocolate into existence.

"Nothing, it's just relaxing." She answers, confirming that it's merely a trip based on her own interest and not core to the plot at all. Side quest unlocked!