Very well, then Ser Chulainn, I shall refrain myself from using it.

[...Though his introduction at the start does tip him to something. This man was a Servant in a Holy Grail War. The title of Lancer was enough to notify him of that, and the fact that he's not Diarmuid ua Duibhne also meant that he is not of the same Holy Grail War.]

Answer me, do you know of a Fianna going by the name Diarmuid residing in this place?