This is Aran (King) Dolen of Thildín, the western, coastal country of Ardanen. As the first Káno (Commander), he is the Commander of all the units, protects the Tarí (Queen) at all times, and leads the Calvary unit personally with his horse, Niphel.
Dolen is an amiable, easy-to-like guy. He socializes with all of his subordinates and acts like a friend, brother, and/or father to all of his men. He personally invited Faroth down from Talath (the northern, desert country) and watches over him like a father.
Read more about Dolen in I Ernil ar I Káno (The Prince and The Commander), found
here.
~Shizu ^_^v <3