Dinklebot tried to toe the line between serious and emotional, and ended up committing to neither, making him monotone. Nolandroid took the wrong direction, going full emotion. But let's be real. Ghost is a robot. Robots aren't emotional saps. We need someone cold. Analytical. Calculating. Mechanical.
We need... Keith Davidrone.
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As awesome as that would be, it would just sound like Mass Effect.