Excellent, they are fighting the clock, and also Kastimund has a challenge to accomplish and he'd be annoyed with Riale if he got in the way of completing that. It's convenient that he's not.
He lands and walks briskly and without a care for the various people on the streets. Several walk through him. He doesn't seem to mind, or even notice. His eyes are towards the sky and the buildings, watching for the light and how it scatters through the glass, and calculating how it would change throughout the day. He stops if Riale seems like he'll fall behind, but otherwise, doesn't slow down. Riale is led to some of the largest, most impressive landmarks first, but Kastimund doesn't lead him inside any of them. In fact, after a quick survey of the streets around them, he makes a disappointed humming sound, and immediately leads away from it. They keep away from the main streets soon enough, through crowded alleyways and forgotten side streets. There's a pattern to the places Kastimund searches - small, overlooked places that get little traffic but are bathed in light from nearby wonders.
After winding through what must be half of the alleys in the city, as the light from the sun begins to redden with the hues of sunset, Kastimund stops. The overgrown courtyard he stops in is badly sized and awkwardly placed, a long ways away from any street that could be called a major one, and found through a confusing network of cramped, darkened alleyways. Still, the place itself is striking. Even as the sun sinks in the sky, light streams down at just the right angle through several nearby buildings, casting dappled multicolored rays throughout the little forgotten garden. The noise of the city is distant, hushed but not absent.
"Here," says Kastimund, with absolute certainty. "This is where the little firefly sleeps."
He looks quite pleased with himself.