High Septon

From A Wiki of Ice and Fire

The High Septon is the head of the Faith of the Seven. While historically, the High Septon ruled from the Starry Sept in Oldtown, with the coming of Aegon Targaryen, the High Septon at the time threw his support behind Aegon and eventually relocated to the new capital of King's Landing.

The selection of a new High Septon is traditionally in the hands of the Most Devout but the will of past Targaryen Kings has often influenced their choice. Baelor the Blessed had a stoneworker and an eight-year old boy chosen for the office. A new High Septon extends the practice of septons giving up their family names by renouncing any kind of individual name. This leads to trouble distinguishing between various past holders of the office, as one can only refer to them by descriptions such as "the fat one" or the "one before the fat one"

Three High Septons have appeared in the story. The first was a grossly fat man who had been High Septon for many years before being killed in a riot in King's Landing. His replacement was selected by Tyrion Lannister, an old man who prayed with Lancel Lannister. This caused Queen Cersei to cause his death, which lead to a new High Septon, one who was not to her liking either, as he was one of the "sparrows" who have turned up as refugees after the events of the War of the Five Kings. A truly devout holy man, he has arrested Cersei and Margaery due to accusations of infidelity and adultery.