Knight Charlie is a graduate of the Mysterious Department at the Knight Academy. He's a genius who mainly studied stitching and, as far as Han Dong's memory goes, doesn't seem to have much to do with the Mechanical Series.
Moreover, knights of such a level had no need to buy machinery gears from the artisan district for ordinary people.
Even if he needed to adjust complex machinery, Charlie's connections would undoubtedly allow for his easy inspection with advanced mechanics.
"Strange, Charlie is positioned inside the counter, considering the name of this clock shop… could he possibly be the owner? That's impossible. Symbolic Knights have a heavy workload, aside from the special vacation given on the eve of an expedition, they don't have extra time to get away from the Secret Museum."
