Ogam

A Sage, he is always at Arawns' side and self proclaimed "sword and shield". His original form is that of a Dragon, and has been alive for a very long time. His race was destroyed by the White Angels as they deemed them weak, then dropped one of the two moons into the planet to annihilate them. He was a friend to Myrddin before the birth of Arawn.

[Source: Wikipedia]