Obviously either the blonde guy is the dragon but has lost his powers, the son of the drag...

Obviously either the blonde guy is the dragon but has lost his powers, the son of the dragon and princess or whatever, or is out for revenge against someone who is either the dragon or has dragon blood. He's been clear with his intentions from the get go: get as many dragon artifacts as he can. Is he friendly? Kinda yea, is he trustworthy? No. But he hasn't decieved anyone, he's very straightforward. The knight was getting ahead of himself too much.