[It looks like he doesn't hear her at all, actually. Either the glass is thick enough to make whatever noise or words she says obsolete, or he's too distracted with whatever he's looking at here to notice.
Jade and Floyd for some reason are standing back rather than coming close, despite the fact that they should have caught up with her by now. But she might be too distracted to notice that just yet while she's busy watching Azul.
Eventually it becomes obvious what it is he's looking at as he holds something up in front of him, squinting at it. A coin, maybe? Did someone drop loose change in the aquarium or something?]
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Jade and Floyd for some reason are standing back rather than coming close, despite the fact that they should have caught up with her by now. But she might be too distracted to notice that just yet while she's busy watching Azul.
Eventually it becomes obvious what it is he's looking at as he holds something up in front of him, squinting at it. A coin, maybe? Did someone drop loose change in the aquarium or something?]