Sarin stares back into Mira's eyes and says to her after a bit, "I have heard of you...but I always thought you were a myth.  I always thought the keeper of a dragon's heart was just a old term for a dragon's soul mate."  He then says to Shay, "The reason I look so human is because I can assume human form.  In my true form I would not fit in this building.  I stand a good 20 feet tall and I am about 30 feet long."