One guess down.
I'll be at Grand Rapids Comic Con this weekend! Details and a map over here: http://alexis-royce.tumblr.com/post/151984503675
Hunm, almost unknown in France as far as I know. That's where I begin to have problems with cultural references.
Nice triangular layout putting focus on a darkened panel, and I like the work on the framings; the character's stances come out enhanced by your intelligent use of them. I also remark the black bar, I assume the pub's flap, nicely restricting its panel against the uper page thus permitting our gaze to slide down from the first panel to the lowered second one.
Also, typical of Susan to sit on the table.
It occurs to me that Emile had no trouble identifying those two as Jekyll/Hyde children. This makes me wonder if this mystery man gave an incorrect answer because he understands that in a story if you have three guesses the first two have to be wrong. If the first guess was correct that would be boring and the binding does not like boring stories.
@Mady: Well, since we ruled out Sherlock in one page already, my guess is that Emile is simply a better detective, and also, it's at least part of what he does for a living, identifying Descendants. It's probable that he simply has the advantage there. But, yeah, first guesses have to be wrong.