Just looking at the figure, it was easy to tell he was a "bad guy", with those black robes and staves that nearly glowed wickedly in the dark. Even though I wasn't aware of sword and sorcery tropes, when I played with my DnD figures Kelek was the manipulative mastermind who rarely fought the good guys directly. We he did enter the fray, it was always in the back, where he'd fling magic blasts.
In short, a proper DnD magic-user.
One of the things I enjoyed so much about the DnD line of toys, was the cloth accessories, weapons and care for detail, and they were more articulated than Kenner' Star Wars line, though not as articulated as Hasbro's G.I. Joe Line.
But they were amongst my favorites and I still cherish them to this day.