The CSv2 Carl Sagan walker drone was an experimental design developed by the late Jake Russell of Cybertech Industries (a wholly owned Ares subsidiary).  In an attempt to design a "drone with a personality," Russell delved into the relatively uncharted field of robots and learning systems.  The result is the CSv2 Carl Sagan, named for the 20th century science fiction author who profoundly influenced Russell and his work.

The Carl Sagan has little "practical" application.  What it lacks in application, however, it more than makes up for in new design techniques.  A "micro-walker," the CSv2 is built to appear as a very small human, complete with synthetic skin and finishing touches.  The robot's microtronic design and coding algorithms are implemented in such a way that the CSv2 actually develops what would be termed a "personality."  This personality progresses over time and is dependent on the situations in which the CSv2 finds itself.  The CSv2 is not human, however.  It is best to think of this personality as one might regard a pet's nature.

The CSv2 does exhibit some use as a reconnaisance drone and is speedy and agile, even for its size.  It readily adapts to its environment and can also operate underwater.  It cannot, however, weather even the mildest of attacks.
 

Rooster

[This drone's not capable of a whole lot, granted, but it can come in useful for a number of different tasks.  The CSv2 is small and nimble, and it comes in great for recon-type work.  It's control and logic algorithms are also adaptive, so it can effectively "learn."  You won't find too many drones that do that.]

Tool

[...or runners, for that matter.  I can think of a few that could probably use the same control microtronics.]

Eightball

[I think I've seen one of these things in action before -- literally looks like a little guy running around.  Some sick frag had 'em dressed  up in a suit like a little gangster, complete with hat.  Convincing image, but still pretty fragged up, if you ask me.]

Tomahawk