Shartek, from Martian Dreams
In reality, "Shartek" was part of an illusion created by Faulinei, the Shadowlord of Falsehood, in order to test the Avatar. Shartek at first appeared to be one of two copies of Dr. Spector, and the Avatar had to discern which was the false Spector.
The hero was able to quickly puzzle out the truth, and continued on to another test.
- Shartek has the same portrait as the other Martian encountered in the Dream-World, Tarpch.