Kyril Sindermann was a notable Iterator of the burgeoning Imperium of Man during the Great Crusade, whose gifts as a skilled orator and master of rhetoric were widely known throughout the galaxy during the late 30th and early 31st Millennia. In the wake of the tragic events of the Horus Heresy, Kyril Sindermann would take on a new identity as one of the four founders of the newly created Inquisition.