Who is Gregory Powell from the novel, I, Robot?

Gregory Powell is Michael Donovan’s partner. Together the two men have figured out many problems with robots, including the problem of the robot who came to be regarded as a prophet among its fellow robots and a set of primary and subsidiary robots that malfunctioned whenever danger occurred. Powell was the one who often figured out the problem and came up with a suitable solution. Powell also became one of the first persons to experience interstellar travel, though it was an experience he did not much enjoy.