— Lady Olianthe Rathbone, Inquisitrix Prima
Lady Olianthe claims membership of none of the three great Ordos. She originated among [the [Calixis Sector]]'s nobility and still favors magnificent ballgowns and elaborate wigs, which would not look out of place in the ballroom of some governor’s palace. Beneath the finery, her piercing, ice-cold grey eyes betray a keen and ruthless intelligence. Some say she was originally an Interrogator in the employ of Lord Inquisitor Anton Zerbe but there is never any obvious familiarity shown between them.
Lady Olianthe is very difficult to know and impossible to befriend, and manages to suggest that everyone around her is her inferior without actually stating it out loud. Secretly a deep-seated Radical, Lady Olianthe is an Isstvanian and believes that for the Imperium to become stronger, it must be exposed to war and catastrophe. The Calixis Sector, to her way of thinking, is bloated and irredeemable, and desperately needs a major cataclysm to weed out its weak and corrupt citizens.
While she is not averse to combating particularly horrible threats like Chaos cultists or the mutants she personally despises, Lady Olianthe is also constantly on the lookout for ways to manipulate the power structures of the Calixis Sector towards strife. She intends to do this by subtly coaxing the sector’s leading noble houses towards conflict or rebellion. She is willing to pursue this agenda personally, treating her acolytes as little more than intelligence gatherers who have no idea of her destructive ambitions. The Tyrant Star would be a wonderful tool for her purposes.