When the book Fourth Wing launched it went viral instantly. Naturally a dragon from the Empyrion would make his way to the dragon of the month eventually.
Tairn is the biggest and fiercest of all the dragons in the world. When he bonds with the most fragile human, the other dragons think he is crazy. But Tairn always knows what he is doing. His quips and dragon wisdom made the story of Violet much more enjoyable. He has an all knowing attitude, but it is well deserved. He has fought in the war for many many years. He claims that Violet is his last human bond. When she dies, so will he.
All the more reason to be protective and also to fight or die.
Andarna may be cute but Tairn takes the lead when it comes to dragons in the never ending war of the Empyrion. No other dragon will challenge him when his mind is set.