"So you do know what is and what isn't appropriate yet you still have the heart and mind to keep me waiting all this while".
Dilya has shown Orun the utmost courtesy in every way necessary, except the part that has to do with her explaining to Orun why he is here and how she knows about him.
The how she knows about his identity is something that Orun has figured out by himself.
He learned the connection the elves had with nature and their respect for the elemental kings.
Orun learned it all after listening to their solid explanation on what elementals are, and from where their powers are gotten.
With that much connection to nature and that much knowledge about elements and elementals, it won't be too shocking for them to realize who the current elemental kings are and how to get to them.
He is not a one hundred percent sure of it, but has the idea it is what really happened.
All he needs is the confirmation from Dilya to be aware that what he thinks is right.