People-watching wasn't quite what Kingu would call what he did, but it was a similar enough concept. While he had been at the island prior, and for enough time at that, the intricacies of modern society were still somewhat of a mystery. There was second-hand knowledge in this vessel, but it was flimsy and ingrained rather than lived. Observing others was not much different, but it offered him the chance of insight.
And there was the occasional denizen that piqued his interest. Kingu's Presence Detection was still carefully tuned for magical signals, and such were not uncommon in this place. So he's watched this one for a time, the vague flow of something like magic wrapped around that lanky frame, and tried to decipher what exactly it meant. Not quite human, not a magus, not a divine being. Perhaps Kingu expected to witness some kind of feat that would point him in the right direction, but instead...
Why did he seem to move so sluggishly? Almost out of breath, slower than others, struggling with the weight of what seems like mere shopping bags. He'd expected something superhuman, not this pathetic display.
"You certainly lack stamina, do you not?"
Was that rude to say? Definitely, but there was some merit to it, he supposed. Surely there was reason for this. Perhaps whatever was giving off that signature was detrimental.