It seems it does, in fact. Normally such a wound, inflicted by nothing but a regular sword would be entirely meaningless, healed in a matter of moments.

[Or is that because he isn't using his Noble Phantasm? He hasn't been injured at any other time. But it's better not to think about that. But he notices Dorian's hesitance, and so he steps closer to touch the boy's arm, offering as good a smile as ever.]

Is something the matter, Dorian?