[He doesn't recognize her! This is... good, actually. She can save herself some embarrassment.]

Oh yes, sir knight, a curse most foul! You see, there is another unicorn within this very meadow, one which produces all manner of illusions meant to test men's souls. A brave prince is now pitting his mettle against the cruel creature to rescue the princess held in its thrall, but I fear the trial may prove taxing.

[Wait... where the hell did that come from?! How did she even know all that?!]