Well...this picture turned out quite different than I expected it would.
In Dark Cloud, the forces of darkness or evil are often symbolized by the color purple. Thus, we have the purple aura of evil swelling around our hero, Toan, here.
I started to think about how Toan might have felt at the beginning of his journey. I don't think he was always so courageous and bold as he is later on...thus the concept came for a frightened looking Toan. Something you don't really see very often.