[ His blue eye widened, to match his other, and he tipped his head. There's a bit of mockery in that, the way he looks surprised, that he would have to ask. ]

Oh, you don't know what they are? [ He'd guessed there was one person who would say anything about Silco here -- at least until a few days later, and he gets to beef it thanks to other old enemies from his world -- and Caitlyn was one of those said enforcers. ]

They're the authorities. Piltover's, more specifically. People who enforce the rules of a city disinterested in us unless we either make them profit, or we try to buck the yolk, as it were. Then they like to come down, maim or kill those of use who are causing any trouble, and then return to the clean air topside.

[ The refused to even breathe their air. It wasn't good enough for them, but it was plenty good for the Zaunites, down in the fissures, wasn't it? ]

They protect the moneyed interests of the city above, make sure we are... kept in line, kept quiet, and docile. [ Silco looked at him, with one eye eternally open. It's easy to imagine, with the punctuated consonants, that this man has experienced much of the... downsides to Piltover's authorities. ]