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  ====Season 6====
  Olenna takes steps to free Margaery from the High Sparrow and retake power from the Faith Militant, but the plan is thwarted when Tommen forges an alliance with the Faith and becomes the High Sparrow's new puppet. Margaery feigns loyalty and manages to instruct Olenna to leave the city when the High Sparrow threatens her life.
  Cersei's plotting ultimately causes the destruction of the Great Sept of Baelor, killing Margaery, Loras, Mace, and the High Sparrow. A grieving Olenna is invited to Dorne to meet with Ellaria Sand, who has seized control of the region and declared open rebellion against the Lannisters. In Dorne, Ellaria presents Varys, who persuades Olenna to support Daenerys Targaryen, having been a secret Targaryen loyalist all along. Olenna sends the Tyrell fleet to Meereen to assist in taking Daenerys' forces to Westeros.