Mercor is a male golden dragon, partnered by the dragon keeper Sylve. Among the dragons, he is the wisest and oldest-seeming, having a great store of dragon memories. As a dragon, he retains the false-eyes, in blue on his gold skin (the reverse of his serpent coloring, when he was Maulkin), that serve as a visual marker of his status as one who can remember both dragon and serpent lives.
Though the other dragons will not acknowledge any one of their number as a leader, he is closest thing to the leader among the dragons. Mercor is rather presented as someone whose memories and advice the other dragons respect.