Fourth planet of Eridani A, classed with Ix as supreme in machine culture. Noted for miniaturization. (For a detailed study on how Richese and Ix escaped the more severe effects of the Butlerian Jihad, see The Last Jihad by Sumer and Kautman.)

Richese was the fourth planet in the Epsilon Eridani star system, and classed with Ix as supreme in machine culture since both planets escaped the more severe effects of the Butlerian Jihad. Richese was noted for miniaturization.