The name given by Michael Burnham to the tardigrade found on the U.S.S. Glenn following the ship's failed propulsion experiment. Ripper was beamed aboard the U.S.S. Discovery by Captain Lorca in the hopes the creature could offer a tactical advantage in the war against the Klingon Empire.
Commander Landry was killed by Ripper while trying to expedite its analysis. Later, Burnham would correctly hypothesize that Ripper was the solution to the organic-propulsion drive experiment.