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  ====Season 5====
  When Loras is arrested by the recently reinstated Faith Militant for his homosexuality, Margaery writes to her grandmother who returns to the capital in order to protect her grandchildren from Cersei's schemes. But, mistakenly believing Loras's arrest was simply meant to humiliate House Tyrell, she helplessly assists to Olyvar's testimony which incriminates her grandson, as well as to Margaery's incarceration for perjuring herself in front of the gods in an effort to protect her brother. She later confronts the High Sparrow without results and has a secret meeting with Littlefinger who, blackmailed by Olenna for his part in Joffrey's death and in order to placate his role in her grandchildren's imprisonment in providing Olyvar to Cersei, gives valuable information about Lancel and Cersei's adulterous relationship. This results in the latter's arrest by the Faith Militant.