Ephemeris

Ephemeris was once a Patterner, the prize pupil of the brilliant Azimuth.

Ask Vector Prime
During the Age of Origins, Ephemeris studied under Azimuth. He was her best pupil, and they even shared a body-type, but they eventually had a falling out. Out of spite, he took what he knew and entered into the service of Galvatron, whom she considered her greatest enemy and living antithesis. His alliance with this agent of chaos broke her spark.

Toys

 * No toy of Ephemeris has been released, though he is described in "Ask Vector Prime" as having the body of the blue MC-6 Kronoform toy from the Micro Change line.