Oh, I see. If he was brought from the imperial palace, Lewis/Oscar must be the son of (or just related to) that "ghost" lady judging by the hair color. If he's got royal blood in him it'd explain why he looked familiar to Canaria, though I feel like more people would have noticed so I'm not certain on that guess.
Also surprised Ricardo actually turned out to be a good dude, with how obvious they were with those "this guy is more than he seems" bits. Happy to be wrong about that!