Left panel: V vs. V − K color magnitude diagram of all the Pleiades members observed with K2, with the stars studied in this paper marked with red circles. The solid line marks the 125 Myr-old isochrone of the cluster. Right panel: period vs. V − K diagram of all the K2 targets in the Pleiades classified as periodic, with the stars studied in this paper marked with red circles. Only one star lies in the “slowly rotating sequence”, while five are in the “rapidly rotating population”.