Just a hunch. I am a detective, [ he says, looking pleased that his guess was on the money. ] He mentioned someone younger than him had arrived from his world, yes. He didn't mention your name or anything like that.

[ Like that. It's a way to obfuscate just how much Kim knows about Ken and his life now; he knows of Ken's past, the fact that he joined the same organization as Aragaki did, the fact that he now rues the revenge he once sought. It was told to him in confidence, however, so he won't bring it up. No need to make their lives any more difficult. ]

I've seen most of the other newcomers by now and you're likely the youngest among them, plus your names sound like they're from the same place, therefore... [ Kim shrugs. ] A good guess.