Out of everyone in the Blind Crow Tavern, it was mostly Leif who was aware of Lucius's true identity.
With the amount of information readily available with him, it would be a disgrace if Leif didn't actually know who 'Lucius' was.
It was only for the sake of business that Leif didn't say a word.
Meanwhile, Arius, Cohen and Carlyle were still mostly left in the dark, but it didn't mean that they couldn't also intuit who they might be dealing with.
From the information being asked by 'Lucius', to their current living quarters near the rehabilitation center and what it previously used to be, it was simply a matter of connecting the dots.
Out of all of them, Arius was the one who had figured it out the fastest, though he made no outward mention of it.
Cohen and Carlyle were… close.